[英]For some reason, my JPanel is not showing up
這是我的代碼
import javax.swing.*;
import java.awt.*;
import java.awt.Graphics;
public class Test extends JFrame{
private JButton by;
private JButton bn;
JLabel startQuestion;
public Test() {
JPanel p = new JPanel();
by = new JButton("Yes");
bn = new JButton("No");
startQuestion = new JLabel("Would you like to start?");
p.setLayout(null);
by.setBounds(180, 250, 70, 45);
bn.setBounds(250, 250, 70, 45);
startQuestion.setLocation(195, 240);
p.add(by);
p.add(bn);
add(startQuestion);
add(p);
setDefaultCloseOperation(3);
setSize(500, 500);
setVisible(true);
}
public static void main(String...args) {
new Test();
}
}
沒有語法錯誤,但是沒有添加我的 Jlabel(按鈕工作正常)。 我不想從 null 更改布局,因為我希望能夠定義按鈕和標簽的位置。 有誰知道為什么這不起作用?
這個問題類似於JLabel won't show with JPanel.setLayout(null)。 為什么?
要在這里回答它,請添加如下一行:
startQuestion.setBounds(150, 150, 200, 20);
import javax.swing.*;
import java.awt.*;
import java.awt.Graphics;
public class Test extends JFrame{
private JButton by;
private JButton bn;
JLabel startQuestion;
public Test() {
JPanel p = new JPanel();
by = new JButton("Yes");
bn = new JButton("No");
startQuestion = new JLabel("Would you like to start?");
//p.setLayout(null);
by.setBounds(180, 250, 70, 45);
bn.setBounds(250, 250, 70, 45);
startQuestion.setLocation(195, 240);
p.add(by);
p.add(bn);
add(startQuestion);
add(p);
setDefaultCloseOperation(3);
setSize(500, 500);
setVisible(true);
}
public static void main(String...args) {
new Test();
}
}
你需要評論setlayout(null);
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.