Question

为什么下面的java程序运行后按钮组件不显示

import java.awt.event.*;
import javax.swing.*;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Font;
import java.awt.GridLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class TestJrame {

private JButton button1,button2,button3；
JPanel panel = new JPanel(new GridLayout(1,7,0,0));
JPanel panel1 = new JPanel(new GridLayout(1,1,0,0));
JPanel panel2 = new JPanel(new GridLayout(2,1,0,0));
JPanel panel3 = new JPanel(new GridLayout(2,1,0,0));
button1 = new JButton("JButton");
button1.setFont(new Font("宋体", Font.BOLD, 12));
button2 = new JButton("Check/Radio");
button2.setFont(new Font("宋体", Font.BOLD, 12));
button3 = new JButton("JComboBox");
button3.setFont(new Font("宋体", Font.BOLD, 12));

panel2.add(button1);
panel2.add(button2);
panel3.add(button3);

panel.add(panel1);
panel.add(panel2);
panel.add(panel3);

public static void main(String args[]){
JFrame frm=new JFrame("组件皮肤定制预览工具");
frm.setJMenuBar(mb);

frm.setBounds(10,10,800,600);
frm.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frm.setVisible(true);
}

}

Answer 1

你的程序我帮你改好了,改动的地方见注释.现在程序运行后按钮组件可以显示了.

完整的Java程序如下:

import java.awt.event.*;

import javax.swing.*;

import java.awt.BorderLayout;

import java.awt.Color;

import java.awt.Font;

import java.awt.GridLayout;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JPanel;

public class TestJFrame {  //这里TestJrame改成TestJFrame

 private JButton button1,button2,button3; 

 JPanel panel = new JPanel(new GridLayout(1,7,0,0)); 

 JPanel panel1 = new JPanel(new GridLayout(1,1,0,0)); 

 JPanel panel2 = new JPanel(new GridLayout(2,1,0,0)); 

 JPanel panel3 = new JPanel(new GridLayout(2,1,0,0)); 

 TestJFrame(){//这里加构造函数

  button1 = new JButton("JButton"); 

  button1.setFont(new Font("宋体", Font.BOLD, 12));

  button2 = new JButton("Check/Radio"); 

  button2.setFont(new Font("宋体", Font.BOLD, 12)); 

  button3 = new JButton("JComboBox"); 

  button3.setFont(new Font("宋体", Font.BOLD, 12)); 

  panel2.add(button1); 

  panel2.add(button2); 

  panel3.add(button3);

  panel.add(panel1);  

  panel.add(panel2); 

  panel.add(panel3);

 }

 public static void main(String args[]){ 

  TestJFrame f=new TestJFrame();//这里创建对象

  JFrame frm=new JFrame("组件皮肤定制预览工具");   

  frm.add(f.panel); //这里把组件加入JFrame中

  frm.setBounds(10,10,800,600);  

  frm.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 

  frm.setVisible(true);  

 } 

}

追问

谢谢！果然出现了。我想只让那些按钮出现在右上角右下部分把下面空出来，而不是铺满整个右边应该怎么弄呀？