如何打印 JOptionPane 中的所有数组元素?
How to print all the array elements in a JOptionPane?
我有一个数组,我想在 JOptionPane 上打印它以获得如下结果:
数组是书单。我不知道如何
数组的代码如下:
String[] booksOfSubGenre = new String[bookInfo.size()];
for (int i = 0; i < bookInfo.size(); i++) {
int j = 0;
if (bookInfo.get(i).getSubGenre().equals(selectedSubGenreInCombobox)) {
subGenreCount++;
System.out.println(subGenreCount);
booksOfSubGenre[j] = bookInfo.get(i).getBookName();
}
}
使用 HTML 格式化您的文本输出。
因此您的文本字符串可能如下所示:
String text = "<html>There are two books of Sub-Genre Fantasy:<br>The Lost Hero<br>Another Book>";
要以该格式显示,您可以使用 String.format() 创建字符串模板并传入数据。
String text = String.format("There are %o books of Sub-Genre Fantasy: %s", subGenreCount , bookInfo.get(i).getBookName());
JOptionPane.showMessageDialog(null, text, "Query Result", JOptionPane.INFORMATION_MESSAGE);
要显示多本书,您可以将书名附加在一起并显示为一个字符串。
String appendedText = "";
int subGenreCount = 0;
String[] booksOfSubGenre = new String[bookInfo.size()];
for (int i = 0; i < bookInfo.size(); i++) {
int j = 0;
if (bookInfo.get(i).getSubGenre().equals(selectedSubGenreInCombobox)) {
subGenreCount++;
System.out.println(subGenreCount);
booksOfSubGenre[j] = bookInfo.get(i).getBookName();
appendedText += bookInfo.get(i).getBookName() + "\n";
}
}
String text = String.format("There are %o books of Sub-Genre Fantasy: %s", subGenreCount , appendedText);
JOptionPane.showMessageDialog(null, text, "Query Result", JOptionPane.INFORMATION_MESSAGE);
第二个参数的类型,名称为message,在classjavax.swing.JOptionPane
的所有showMessageDialog方法中都是Object
这意味着它可以是 any class,包括 Swing 组件,例如 javax.swing.JList
.
考虑以下因素。
import java.awt.BorderLayout;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
public class OptsList {
public static void main(String[] args) {
String[] booksOfSubGenre = new String[]{"The Lost Hero",
"The Hobbit",
"A Game of Thrones"};
int count = booksOfSubGenre.length;
String subgenre = "Fantasy";
JPanel panel = new JPanel(new BorderLayout(10, 10));
String text = String.format("There are %d books of Sub-Genre %s", count, subgenre);
JLabel label = new JLabel(text);
panel.add(label, BorderLayout.PAGE_START);
JList<String> list = new JList<>(booksOfSubGenre);
panel.add(list, BorderLayout.CENTER);
JOptionPane.showMessageDialog(null, panel, "Query Result", JOptionPane.INFORMATION_MESSAGE);
}
}
运行 上面的代码产生以下结果:
我有一个数组,我想在 JOptionPane 上打印它以获得如下结果:
数组是书单。我不知道如何
数组的代码如下:
String[] booksOfSubGenre = new String[bookInfo.size()];
for (int i = 0; i < bookInfo.size(); i++) {
int j = 0;
if (bookInfo.get(i).getSubGenre().equals(selectedSubGenreInCombobox)) {
subGenreCount++;
System.out.println(subGenreCount);
booksOfSubGenre[j] = bookInfo.get(i).getBookName();
}
}
使用 HTML 格式化您的文本输出。
因此您的文本字符串可能如下所示:
String text = "<html>There are two books of Sub-Genre Fantasy:<br>The Lost Hero<br>Another Book>";
要以该格式显示,您可以使用 String.format() 创建字符串模板并传入数据。
String text = String.format("There are %o books of Sub-Genre Fantasy: %s", subGenreCount , bookInfo.get(i).getBookName());
JOptionPane.showMessageDialog(null, text, "Query Result", JOptionPane.INFORMATION_MESSAGE);
要显示多本书,您可以将书名附加在一起并显示为一个字符串。
String appendedText = "";
int subGenreCount = 0;
String[] booksOfSubGenre = new String[bookInfo.size()];
for (int i = 0; i < bookInfo.size(); i++) {
int j = 0;
if (bookInfo.get(i).getSubGenre().equals(selectedSubGenreInCombobox)) {
subGenreCount++;
System.out.println(subGenreCount);
booksOfSubGenre[j] = bookInfo.get(i).getBookName();
appendedText += bookInfo.get(i).getBookName() + "\n";
}
}
String text = String.format("There are %o books of Sub-Genre Fantasy: %s", subGenreCount , appendedText);
JOptionPane.showMessageDialog(null, text, "Query Result", JOptionPane.INFORMATION_MESSAGE);
第二个参数的类型,名称为message,在classjavax.swing.JOptionPane
的所有showMessageDialog方法中都是Object
这意味着它可以是 any class,包括 Swing 组件,例如 javax.swing.JList
.
考虑以下因素。
import java.awt.BorderLayout;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
public class OptsList {
public static void main(String[] args) {
String[] booksOfSubGenre = new String[]{"The Lost Hero",
"The Hobbit",
"A Game of Thrones"};
int count = booksOfSubGenre.length;
String subgenre = "Fantasy";
JPanel panel = new JPanel(new BorderLayout(10, 10));
String text = String.format("There are %d books of Sub-Genre %s", count, subgenre);
JLabel label = new JLabel(text);
panel.add(label, BorderLayout.PAGE_START);
JList<String> list = new JList<>(booksOfSubGenre);
panel.add(list, BorderLayout.CENTER);
JOptionPane.showMessageDialog(null, panel, "Query Result", JOptionPane.INFORMATION_MESSAGE);
}
}
运行 上面的代码产生以下结果: