Java开发网 - 百思不得其解的问题

Topic: 百思不得其解的问题

1.百思不得其解的问题

Posted by: kingfhr
Posted on: 2007-12-08 10:29

package tcp客户端e;
import java.awt.*;
import java.awt.Container;
import javax.swing.*;
public class Cliente extends JFrame{
  JTextArea t1=new JTextArea(10,10);
  JTextField t2=new JTextField(20);
  JButton b1=new JButton("send");
  JButton b2=new JButton("连接服务器");
  JScrollPane jsp=new JScrollPane(t1);
  public Cliente(){
    JPanel p1=new JPanel();
    p1.add(t2);
    p1.add(b1);
    JPanel p2=new JPanel();
    p2.add(b2);
    this.getContentPane().setLayout(new BorderLayout());
    Container contentPane=this.getContentPane();
    contentPane.add(jsp,BorderLayout.CENTER);
    contentPane.add(p2,BorderLayout.NORTH);
    contentPane.add(p1,BorderLayout.SOUTH);
    setTitle("客户端e");
    setVisible(true);
    setSize(340,300);
  }
  public static void main(String[] args) {
    Cliente mainFrame=new Cliente();
  }
}

上面这段程序为什么显示界面一片空白？各位谁有时间帮忙看看，不胜感激！

2.Re:百思不得其解的问题 [Re: kingfhr]	Copy to clipboard
Posted by: grubby__4k Posted on: 2007-12-09 17:56 那是因为你没调整好坐标还有在340，300中显示的按钮位置没定义如果你最大化该窗口就会发现有按钮

3.Re:百思不得其解的问题 [Re: kingfhr]	Copy to clipboard
Posted by: kingfhr Posted on: 2007-12-13 10:39 我试过改窗口大小，也试过最大化运行窗口还是不行后来知道要把 setVisible(true); setSize(340,300);调换位置

4.Re:百思不得其解的问题 [Re: kingfhr]

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Posted by: kantery
Posted on: 2008-05-16 16:18

我改了改，你看看这个，是你想要的那个吗？

import java.awt.BorderLayout;
import java.awt.Container;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;

public class Cliente extends JFrame {
  JTextArea t1;

  JTextField t2;

  JButton b1;

  JButton b2;

  JScrollPane jsp;

  public Cliente() {
    t1 = new JTextArea(10, 10);
    t2 = new JTextField(20);
    b1 = new JButton("send");
    b2 = new JButton("连接服务器");
    jsp = new JScrollPane(t1);
    Container container = this.getContentPane();
    JPanel p1 = new JPanel();
    p1.add(t2);
    p1.add(b1);
    JPanel p2 = new JPanel();
    p2.add(b2);
    container.add(jsp, BorderLayout.CENTER);
    container.add(p1, BorderLayout.NORTH);
    container.add(p2, BorderLayout.SOUTH);
    this.setTitle("客户端e");
    this.setSize(340, 300);
    this.setVisible(true);
  }

  public static void main(String args[]) {
    Cliente client = new Cliente();
    client.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  }
}

5.Re:百思不得其解的问题 [Re: kingfhr]

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Posted by: kantery
Posted on: 2008-05-16 16:40

我改了改，你看看这个，是你想要的那个吗？

import java.awt.BorderLayout;
import java.awt.Container;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;

public class Cliente extends JFrame {
  JTextArea t1;

  JTextField t2;

  JButton b1;

  JButton b2;

  JScrollPane jsp;

  public Cliente() {
    t1 = new JTextArea(10, 10);
    t2 = new JTextField(20);
    b1 = new JButton("send");
    b2 = new JButton("连接服务器");
    jsp = new JScrollPane(t1);
    Container container = this.getContentPane();
    JPanel p1 = new JPanel();
    p1.add(t2);
    p1.add(b1);
    JPanel p2 = new JPanel();
    p2.add(b2);
    container.add(jsp, BorderLayout.CENTER);
    container.add(p1, BorderLayout.NORTH);
    container.add(p2, BorderLayout.SOUTH);
    this.setTitle("客户端e");
    this.setSize(340, 300);
    this.setVisible(true);
  }

  public static void main(String args[]) {
    Cliente client = new Cliente();
    client.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  }
}