我有这段代码，如何在 java 中将它从控制台传输到 GUI？
I have this code, how can I transfer it from console to GUI in java?
我有这段代码，在控制台上完成并运行良好，但我需要将它转移到 GUI，例如我有 4 个操作，它们是计算和处理中位数、众数、均值和标准差。因此，我需要有 4 个文本字段输入和一个按钮来计算 4 个操作，并在程序本身或弹出窗口中显示。
import javax.sound.midi.SysexMessage;
import java.util.Arrays;
import java.util.*;
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
import javafx.application.Application;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.stage.Stage;
import javafx.scene.text.Text;
import java.applet.*;
import javax.swing.*;
public class FinalProg {
Button button;
public static void main(String[] args)
{
// int[] dataSet = {1,2,3,4,345,312,756,0,-234321132,234};
// int[] dataSet = {5,3,2,5,2,5,758,345,32,231,5,5,5,2,2};
// Scanner scanner = new Scanner(System.in);
// String input = scanner.nextLine();
//
//
//
//
//
//
//
//
//
// int [] dataSet = new int[input.length()];
Scanner scanner = new Scanner(System.in);
String input = scanner.nextLine(); //Numbers inputted from user in your case
String[] list; //List to store individual numbers
list = input.split(" "); // Regex to split the String so you get each number
//Mean
int sum = 0;
for (String n : list) {
sum += Integer.parseInt(n);
}
System.out.println("The mean of the data set is " +
((double) sum / list.length));
//Median
Arrays.sort(list);
// if (list.length % 2 != 0) {
// System.out.println("The median of the data set is: " + Double.parseDouble(list[list.length / 2]));
// } else {
// float median = (Integer.parseInt(list[list.length/2]+Integer.parseInt(list[(list.length/2)-1])) / 2f );
// System.out.println("The median of the data set is: " + median);
//// System.out.println("The median of the data set is: " + Double.parseDouble(list[list.length / 2] + list[list.length / 2 - 1]) / 2.0);
// }
if (list.length % 2 == 0) {
System.out.println("The median of the data set is: " + Double.parseDouble(list[list.length / 2]) + Double.parseDouble(list[list.length / 2 - 1]) / 2);
} else {
// float median = (Integer.parseInt(list[list.length/2]+Integer.parseInt(list[(list.length/2)-1])) / 2f );
System.out.println("The median of the data set is: " + list[list.length / 2]);
// System.out.println("The median of the data set is: " + Double.parseDouble(list[list.length / 2] + list[list.length / 2 - 1]) / 2.0);
}
//Mode
int maxNumber = -1;
int maxAppearances = -1;
for (int i = 0; i < list.length; i++) {
int count = 0;
for (int j = 0; j < list.length; j++) {
// if (list[i] == list[j]) {
// count++;
// }
if (list[i].equals(list[j])) {
count++;
}
}
if (count > maxAppearances) {
maxNumber = Integer.parseInt(list[i]);
maxAppearances = count;
}
count = 0;
}
System.out.println("The mode of the data set: " + maxNumber);
//STDV
double STDVsum = 0.0, standardDeviation = 0.0;
int length = list.length;
for (String num : list) {
STDVsum += Double.parseDouble(num);
}
double mean = STDVsum / length;
// for(String num: list) {
// standardDeviation += Double.parseDouble(Math.pow(num - mean, 2)); // It says operator - doesn't apply...
// }
for (String num : list) {
int num_to_Integer = Integer.parseInt(num);
standardDeviation += Math.pow(num_to_Integer - mean, 2); //No need to parse now
}
System.out.println("STDV " + Math.sqrt(standardDeviation / length));
}
}
从控制台程序迁移到 GUI 程序需要的不仅仅是更改主要方法。 GUI 程序是事件驱动的。
事件驱动的意思是，例如，一个按钮被按下，一个事件被触发。作为程序员，您负责编写触发该事件时发生的事情。
我的一些建议。
- 你应该通过教程学习一些基础知识
components and how they work. Some of the basic ones are JLabel,
JTextField, JButton
- 你肯定需要关注如何写event listeners。
您可能想要关注的一些基本事件是 ActionListener for button presses MouseListener 鼠标事件。
- 您可以使用 Java Swing 轻松创建表单并实现它
功能。它始终是一个很好的起点。一旦掌握了基础知识，就可以继续学习更复杂的内容 material.
- 使用一些高级 IDE，例如 NetBeans, Eclipse, IntelliJ, etc. Here are some basic projects to start from NetBeans。
从技术上讲，如果我回答你的问题，
您可以使用 Java Swing.
将控制台应用程序转换为 GUI 应用程序
- 您正在从控制台获取输入。取而代之的是，您可以使用
JTextFields 或 JTextArea 随您希望获得输入。
- 你可以使用一些
JButtons 来触发需要的进程
在填充 JTextFields 后执行。
- 您可以使用
JTextArea 来写入您在控制台上写入的内容，而不是将您通常写入的内容写入控制台。如果你有系列或句子，你可以使用 JTextArea 的 append() 方法。
下面是我使用 NetBeans 在 Swing 中创建的代码 IDE,
import java.util.Arrays;
public class Whosebug extends javax.swing.JFrame {
String[] list;
/**
* Creates new form Whosebug
*/
public Whosebug() {
initComponents();
}
/**
* This method is called from within the constructor to initialize the form.
* WARNING: Do NOT modify this code. The content of this method is always
* regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
mainPanel = new javax.swing.JPanel();
inputTxt = new javax.swing.JTextField();
scrollPane = new javax.swing.JScrollPane();
consoleTxt = new javax.swing.JTextArea();
stdvBtn = new javax.swing.JButton();
modeBtn = new javax.swing.JButton();
medianBtn = new javax.swing.JButton();
meanBtn = new javax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
inputTxt.addKeyListener(new java.awt.event.KeyAdapter() {
public void keyReleased(java.awt.event.KeyEvent evt) {
inputTxtKeyReleased(evt);
}
});
consoleTxt.setColumns(20);
consoleTxt.setRows(5);
scrollPane.setViewportView(consoleTxt);
stdvBtn.setText("STDV");
stdvBtn.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
stdvBtnActionPerformed(evt);
}
});
modeBtn.setText("Mode");
modeBtn.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
modeBtnActionPerformed(evt);
}
});
medianBtn.setText("Median");
medianBtn.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
medianBtnActionPerformed(evt);
}
});
meanBtn.setText("Mean");
meanBtn.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
meanBtnActionPerformed(evt);
}
});
javax.swing.GroupLayout mainPanelLayout = new javax.swing.GroupLayout(mainPanel);
mainPanel.setLayout(mainPanelLayout);
mainPanelLayout.setHorizontalGroup(
mainPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(mainPanelLayout.createSequentialGroup()
.addContainerGap()
.addGroup(mainPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(inputTxt)
.addComponent(scrollPane)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, mainPanelLayout.createSequentialGroup()
.addGap(0, 370, Short.MAX_VALUE)
.addComponent(meanBtn)
.addGap(18, 18, 18)
.addComponent(medianBtn)
.addGap(18, 18, 18)
.addComponent(modeBtn)
.addGap(18, 18, 18)
.addComponent(stdvBtn)))
.addContainerGap())
);
mainPanelLayout.setVerticalGroup(
mainPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(mainPanelLayout.createSequentialGroup()
.addContainerGap()
.addComponent(inputTxt, javax.swing.GroupLayout.PREFERRED_SIZE, 50, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(18, 18, 18)
.addComponent(scrollPane, javax.swing.GroupLayout.PREFERRED_SIZE, 137, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 78, Short.MAX_VALUE)
.addGroup(mainPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(stdvBtn)
.addComponent(modeBtn)
.addComponent(medianBtn)
.addComponent(meanBtn))
.addContainerGap())
);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(mainPanel, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(mainPanel, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
);
setSize(new java.awt.Dimension(730, 381));
setLocationRelativeTo(null);
}// </editor-fold>
private void inputTxtKeyReleased(java.awt.event.KeyEvent evt) {
list = inputTxt.getText().split(" ");
}
private void meanBtnActionPerformed(java.awt.event.ActionEvent evt) {
int sum = 0;
for (String n : list) {
sum += Integer.parseInt(n);
}
consoleTxt.append("The mean of the data set is " + ((double) sum / list.length) + "\n");
}
private void medianBtnActionPerformed(java.awt.event.ActionEvent evt) {
Arrays.sort(list);
if (list.length % 2 == 0) {
consoleTxt.append("The median of the data set is: " + Double.parseDouble(list[list.length / 2]) + Double.parseDouble(list[list.length / 2 - 1]) / 2 + "\n");
} else {
consoleTxt.append("The median of the data set is: " + list[list.length / 2] + "\n");
}
}
private void modeBtnActionPerformed(java.awt.event.ActionEvent evt) {
int maxNumber = -1;
int maxAppearances = -1;
for (int i = 0; i < list.length; i++) {
int count = 0;
for (int j = 0; j < list.length; j++) {
if (list[i].equals(list[j])) {
count++;
}
}
if (count > maxAppearances) {
maxNumber = Integer.parseInt(list[i]);
maxAppearances = count;
}
count = 0;
}
consoleTxt.append("The mode of the data set: " + maxNumber + "\n");
}
private void stdvBtnActionPerformed(java.awt.event.ActionEvent evt) {
double STDVsum = 0.0, standardDeviation = 0.0;
int length = list.length;
for (String num : list) {
STDVsum += Double.parseDouble(num);
}
double mean = STDVsum / length;
for (String num : list) {
int num_to_Integer = Integer.parseInt(num);
standardDeviation += Math.pow(num_to_Integer - mean, 2);
}
consoleTxt.append("STDV " + Math.sqrt(standardDeviation / length) + "\n");
}
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
/* Set the Nimbus look and feel */
//<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
/* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
* For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(Whosebug.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(Whosebug.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(Whosebug.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(Whosebug.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new Whosebug().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JTextArea consoleTxt;
private javax.swing.JTextField inputTxt;
private javax.swing.JPanel mainPanel;
private javax.swing.JButton meanBtn;
private javax.swing.JButton medianBtn;
private javax.swing.JButton modeBtn;
private javax.swing.JScrollPane scrollPane;
private javax.swing.JButton stdvBtn;
// End of variables declaration
}
如果你通过代码，
Used components JTextField, JTextArea, JButton, JPanel,
JFrame.
private javax.swing.JTextArea consoleTxt;
private javax.swing.JTextField inputTxt;
private javax.swing.JPanel mainPanel;
private javax.swing.JButton meanBtn;
private javax.swing.JButton medianBtn;
private javax.swing.JButton modeBtn;
private javax.swing.JButton stdvBtn;
Used ActionListeners to trigger the functions.
例如 ActionListener 调用一个函数（在你的情况下找到平均值）一旦按下平均值按钮它将触发 meanBtnActionPerformed(evt); 函数。
meanBtn.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
meanBtnActionPerformed(evt);
}
});
里面有什么meanBtnActionPerformed(evt);.
private void meanBtnActionPerformed(java.awt.event.ActionEvent evt) {
int sum = 0;
for (String n : list) {
sum += Integer.parseInt(n);
}
consoleTxt.append("The mean of the data set is " + ((double) sum / list.length) + "\n");
}
另一件主要的事情是，在您的控制台应用程序中，当您键入数字并输入它时，String[] list 将填充。为此，我使用了 KeyListener。当用户按下或释放键盘键时，具有键盘焦点的组件会触发按键事件。因此，在您的情况下，当您键入 10 20 30 40 50 时，它将通过调用 inputTxtKeyReleased(evt); 函数将这些数字添加到列表中。
inputTxt.addKeyListener(new java.awt.event.KeyAdapter() {
public void keyReleased(java.awt.event.KeyEvent evt) {
inputTxtKeyReleased(evt);
}
});
所以我建议检查代码，尝试一下，浏览 java 文档并从教程中学习。编码愉快！
我有这段代码，在控制台上完成并运行良好，但我需要将它转移到 GUI，例如我有 4 个操作，它们是计算和处理中位数、众数、均值和标准差。因此，我需要有 4 个文本字段输入和一个按钮来计算 4 个操作，并在程序本身或弹出窗口中显示。
import javax.sound.midi.SysexMessage;
import java.util.Arrays;
import java.util.*;
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
import javafx.application.Application;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.stage.Stage;
import javafx.scene.text.Text;
import java.applet.*;
import javax.swing.*;
public class FinalProg {
Button button;
public static void main(String[] args)
{
// int[] dataSet = {1,2,3,4,345,312,756,0,-234321132,234};
// int[] dataSet = {5,3,2,5,2,5,758,345,32,231,5,5,5,2,2};
// Scanner scanner = new Scanner(System.in);
// String input = scanner.nextLine();
//
//
//
//
//
//
//
//
//
// int [] dataSet = new int[input.length()];
Scanner scanner = new Scanner(System.in);
String input = scanner.nextLine(); //Numbers inputted from user in your case
String[] list; //List to store individual numbers
list = input.split(" "); // Regex to split the String so you get each number
//Mean
int sum = 0;
for (String n : list) {
sum += Integer.parseInt(n);
}
System.out.println("The mean of the data set is " +
((double) sum / list.length));
//Median
Arrays.sort(list);
// if (list.length % 2 != 0) {
// System.out.println("The median of the data set is: " + Double.parseDouble(list[list.length / 2]));
// } else {
// float median = (Integer.parseInt(list[list.length/2]+Integer.parseInt(list[(list.length/2)-1])) / 2f );
// System.out.println("The median of the data set is: " + median);
//// System.out.println("The median of the data set is: " + Double.parseDouble(list[list.length / 2] + list[list.length / 2 - 1]) / 2.0);
// }
if (list.length % 2 == 0) {
System.out.println("The median of the data set is: " + Double.parseDouble(list[list.length / 2]) + Double.parseDouble(list[list.length / 2 - 1]) / 2);
} else {
// float median = (Integer.parseInt(list[list.length/2]+Integer.parseInt(list[(list.length/2)-1])) / 2f );
System.out.println("The median of the data set is: " + list[list.length / 2]);
// System.out.println("The median of the data set is: " + Double.parseDouble(list[list.length / 2] + list[list.length / 2 - 1]) / 2.0);
}
//Mode
int maxNumber = -1;
int maxAppearances = -1;
for (int i = 0; i < list.length; i++) {
int count = 0;
for (int j = 0; j < list.length; j++) {
// if (list[i] == list[j]) {
// count++;
// }
if (list[i].equals(list[j])) {
count++;
}
}
if (count > maxAppearances) {
maxNumber = Integer.parseInt(list[i]);
maxAppearances = count;
}
count = 0;
}
System.out.println("The mode of the data set: " + maxNumber);
//STDV
double STDVsum = 0.0, standardDeviation = 0.0;
int length = list.length;
for (String num : list) {
STDVsum += Double.parseDouble(num);
}
double mean = STDVsum / length;
// for(String num: list) {
// standardDeviation += Double.parseDouble(Math.pow(num - mean, 2)); // It says operator - doesn't apply...
// }
for (String num : list) {
int num_to_Integer = Integer.parseInt(num);
standardDeviation += Math.pow(num_to_Integer - mean, 2); //No need to parse now
}
System.out.println("STDV " + Math.sqrt(standardDeviation / length));
}
}
从控制台程序迁移到 GUI 程序需要的不仅仅是更改主要方法。 GUI 程序是事件驱动的。
事件驱动的意思是，例如，一个按钮被按下，一个事件被触发。作为程序员，您负责编写触发该事件时发生的事情。
我的一些建议。
- 你应该通过教程学习一些基础知识 components and how they work. Some of the basic ones are JLabel, JTextField, JButton
- 你肯定需要关注如何写event listeners。 您可能想要关注的一些基本事件是 ActionListener for button presses MouseListener 鼠标事件。
- 您可以使用 Java Swing 轻松创建表单并实现它 功能。它始终是一个很好的起点。一旦掌握了基础知识，就可以继续学习更复杂的内容 material.
- 使用一些高级 IDE，例如 NetBeans, Eclipse, IntelliJ, etc. Here are some basic projects to start from NetBeans。
从技术上讲，如果我回答你的问题，
您可以使用 Java Swing.
将控制台应用程序转换为 GUI 应用程序- 您正在从控制台获取输入。取而代之的是，您可以使用
JTextFields或JTextArea随您希望获得输入。 - 你可以使用一些
JButtons来触发需要的进程 在填充 JTextFields 后执行。 - 您可以使用
JTextArea来写入您在控制台上写入的内容，而不是将您通常写入的内容写入控制台。如果你有系列或句子，你可以使用 JTextArea 的 append() 方法。
下面是我使用 NetBeans 在 Swing 中创建的代码 IDE,
import java.util.Arrays;
public class Whosebug extends javax.swing.JFrame {
String[] list;
/**
* Creates new form Whosebug
*/
public Whosebug() {
initComponents();
}
/**
* This method is called from within the constructor to initialize the form.
* WARNING: Do NOT modify this code. The content of this method is always
* regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
mainPanel = new javax.swing.JPanel();
inputTxt = new javax.swing.JTextField();
scrollPane = new javax.swing.JScrollPane();
consoleTxt = new javax.swing.JTextArea();
stdvBtn = new javax.swing.JButton();
modeBtn = new javax.swing.JButton();
medianBtn = new javax.swing.JButton();
meanBtn = new javax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
inputTxt.addKeyListener(new java.awt.event.KeyAdapter() {
public void keyReleased(java.awt.event.KeyEvent evt) {
inputTxtKeyReleased(evt);
}
});
consoleTxt.setColumns(20);
consoleTxt.setRows(5);
scrollPane.setViewportView(consoleTxt);
stdvBtn.setText("STDV");
stdvBtn.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
stdvBtnActionPerformed(evt);
}
});
modeBtn.setText("Mode");
modeBtn.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
modeBtnActionPerformed(evt);
}
});
medianBtn.setText("Median");
medianBtn.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
medianBtnActionPerformed(evt);
}
});
meanBtn.setText("Mean");
meanBtn.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
meanBtnActionPerformed(evt);
}
});
javax.swing.GroupLayout mainPanelLayout = new javax.swing.GroupLayout(mainPanel);
mainPanel.setLayout(mainPanelLayout);
mainPanelLayout.setHorizontalGroup(
mainPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(mainPanelLayout.createSequentialGroup()
.addContainerGap()
.addGroup(mainPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(inputTxt)
.addComponent(scrollPane)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, mainPanelLayout.createSequentialGroup()
.addGap(0, 370, Short.MAX_VALUE)
.addComponent(meanBtn)
.addGap(18, 18, 18)
.addComponent(medianBtn)
.addGap(18, 18, 18)
.addComponent(modeBtn)
.addGap(18, 18, 18)
.addComponent(stdvBtn)))
.addContainerGap())
);
mainPanelLayout.setVerticalGroup(
mainPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(mainPanelLayout.createSequentialGroup()
.addContainerGap()
.addComponent(inputTxt, javax.swing.GroupLayout.PREFERRED_SIZE, 50, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(18, 18, 18)
.addComponent(scrollPane, javax.swing.GroupLayout.PREFERRED_SIZE, 137, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 78, Short.MAX_VALUE)
.addGroup(mainPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(stdvBtn)
.addComponent(modeBtn)
.addComponent(medianBtn)
.addComponent(meanBtn))
.addContainerGap())
);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(mainPanel, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(mainPanel, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
);
setSize(new java.awt.Dimension(730, 381));
setLocationRelativeTo(null);
}// </editor-fold>
private void inputTxtKeyReleased(java.awt.event.KeyEvent evt) {
list = inputTxt.getText().split(" ");
}
private void meanBtnActionPerformed(java.awt.event.ActionEvent evt) {
int sum = 0;
for (String n : list) {
sum += Integer.parseInt(n);
}
consoleTxt.append("The mean of the data set is " + ((double) sum / list.length) + "\n");
}
private void medianBtnActionPerformed(java.awt.event.ActionEvent evt) {
Arrays.sort(list);
if (list.length % 2 == 0) {
consoleTxt.append("The median of the data set is: " + Double.parseDouble(list[list.length / 2]) + Double.parseDouble(list[list.length / 2 - 1]) / 2 + "\n");
} else {
consoleTxt.append("The median of the data set is: " + list[list.length / 2] + "\n");
}
}
private void modeBtnActionPerformed(java.awt.event.ActionEvent evt) {
int maxNumber = -1;
int maxAppearances = -1;
for (int i = 0; i < list.length; i++) {
int count = 0;
for (int j = 0; j < list.length; j++) {
if (list[i].equals(list[j])) {
count++;
}
}
if (count > maxAppearances) {
maxNumber = Integer.parseInt(list[i]);
maxAppearances = count;
}
count = 0;
}
consoleTxt.append("The mode of the data set: " + maxNumber + "\n");
}
private void stdvBtnActionPerformed(java.awt.event.ActionEvent evt) {
double STDVsum = 0.0, standardDeviation = 0.0;
int length = list.length;
for (String num : list) {
STDVsum += Double.parseDouble(num);
}
double mean = STDVsum / length;
for (String num : list) {
int num_to_Integer = Integer.parseInt(num);
standardDeviation += Math.pow(num_to_Integer - mean, 2);
}
consoleTxt.append("STDV " + Math.sqrt(standardDeviation / length) + "\n");
}
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
/* Set the Nimbus look and feel */
//<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
/* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
* For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(Whosebug.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(Whosebug.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(Whosebug.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(Whosebug.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new Whosebug().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JTextArea consoleTxt;
private javax.swing.JTextField inputTxt;
private javax.swing.JPanel mainPanel;
private javax.swing.JButton meanBtn;
private javax.swing.JButton medianBtn;
private javax.swing.JButton modeBtn;
private javax.swing.JScrollPane scrollPane;
private javax.swing.JButton stdvBtn;
// End of variables declaration
}
如果你通过代码，
Used components
JTextField,JTextArea,JButton,JPanel,JFrame.
private javax.swing.JTextArea consoleTxt;
private javax.swing.JTextField inputTxt;
private javax.swing.JPanel mainPanel;
private javax.swing.JButton meanBtn;
private javax.swing.JButton medianBtn;
private javax.swing.JButton modeBtn;
private javax.swing.JButton stdvBtn;
Used
ActionListenersto trigger the functions.
例如 ActionListener 调用一个函数（在你的情况下找到平均值）一旦按下平均值按钮它将触发 meanBtnActionPerformed(evt); 函数。
meanBtn.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
meanBtnActionPerformed(evt);
}
});
里面有什么meanBtnActionPerformed(evt);.
private void meanBtnActionPerformed(java.awt.event.ActionEvent evt) {
int sum = 0;
for (String n : list) {
sum += Integer.parseInt(n);
}
consoleTxt.append("The mean of the data set is " + ((double) sum / list.length) + "\n");
}
另一件主要的事情是，在您的控制台应用程序中，当您键入数字并输入它时，String[] list 将填充。为此，我使用了 KeyListener。当用户按下或释放键盘键时，具有键盘焦点的组件会触发按键事件。因此，在您的情况下，当您键入 10 20 30 40 50 时，它将通过调用 inputTxtKeyReleased(evt); 函数将这些数字添加到列表中。
inputTxt.addKeyListener(new java.awt.event.KeyAdapter() {
public void keyReleased(java.awt.event.KeyEvent evt) {
inputTxtKeyReleased(evt);
}
});
所以我建议检查代码，尝试一下，浏览 java 文档并从教程中学习。编码愉快！