Driver 和方法似乎无法协同工作

Question

我有一个学校项目，我们需要创建一个程序来将数字转换为二进制，但我似乎无法让它们协同工作。他们会编译但实际上不会得到正确的答案我的 toString() 方法有效它只是没有得到用户输入的小数或来自 convertToBinary 的二进制所以我不确定它失败的地方。任何帮助都会很棒。 Driver 和下面的方法！谢谢！

Driver:

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

class DecimalConverter extends JPanel{
//Sets up the Window
public DecimalConverter(){ 
  JFrame window = new JFrame("Binary To Decimal");
  //exit program when window closes
  window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

  //WINDOW COMPONENETS:
  JLabel lblPrompt = new JLabel("Enter your number to convert: ");
  JLabel lblBinary = new JLabel("Binary: ");
  JTextField txtDecimal = new JTextField();
  JButton btnToBinary = new JButton("To Binary");

  //SET POSITIONS
  lblPrompt.setBounds(40, 40, 200, 30);
  txtDecimal.setBounds(250, 40, 100, 30);
  lblBinary.setBounds(40, 80, 300, 30);
  btnToBinary.setBounds(250, 120, 100, 30);

  setLayout(null);

  add(lblPrompt);
  add(txtDecimal);
  add(lblBinary);
  add(btnToBinary);

  window.add(this);
  window.setSize(400, 200);
  window.setVisible(true);

  //Event for button
  btnToBinary.addActionListener(new ActionListener(){
     public void actionPerformed(ActionEvent e){
        String str = txtDecimal.getText();

           DecimalBinary b = new DecimalBinary();               

           lblBinary.setText(b.toString());

        }//ends Action Performed
     }//Ends ActionListener
  );//End Event

 }//End Constructor

 public static void main(String args[]){




  new DecimalConverter();

}//ends main


}//End Class

方法：

class DecimalBinary{
private String decimal = "0";
private String binary = "";
private int dec;

public void setDecimal(String decimal){
 int dec = Integer.parseInt(decimal);
 convertToBinary(dec);
}

public String convertToBinary(int dec){
 int pow = 128;

 while (dec > 0){

    if (dec >= pow){
      binary += "1";
      dec = dec - pow;
    } 
    else if (dec < pow){
        binary += "0";
    }
 pow = pow / 2;


 }
 return decimal;
}


  public String  toString(){
  return decimal + " is " + binary + " in binary";
  }
 }

Answer 1

按如下方式更改您的代码 (// added)

public void setDecimal(String decimal){
 this.decimal = decimal // added
 int dec = Integer.parseInt(decimal);
 convertToBinary(dec);
}

public void actionPerformed(ActionEvent e){
    String str = txtDecimal.getText();

    DecimalBinary b = new DecimalBinary();               
    b.setDecimal(str) // added
    lblBinary.setText(b.toString());

}//ends Action Performed

Driver 和方法似乎无法协同工作

Driver and method dont seem to be working toghether

java

methods

driver