简易java实现的QQ聊天系统

package com.javaeasy.learnlayout; import java.awt.Color; import java.awt.Container; import java.awt.GridBagConstraints; import java.awt.GridBagLayout; import java.awt.GridLayout; import java.awt.Point; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JPanel; public class StandaloneLayout { public static void main(String[] args) { JFrame frame = new JFrame(); frame.setSize(600, 200); frame.setLocation(new Point(100, 300)); frame.setTitle("学习Swing的布局管理器"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); Container container = frame.getContentPane(); GridBagLayout layout = new GridBagLayout(); container.setLayout(layout); GridBagConstraints gbc = new GridBagConstraints(); JButton btn1 = new JButton("按钮1"); JPanel panel1 = new JPanel(); panel1.setBackground(Color.ORANGE); JButton btn2 = new JButton("按钮2"); JButton btn3 = new JButton("按钮3"); JPanel panel2 = new JPanel(); panel2.setBackground(Color.BLUE); gbc.gridx = 0; gbc.gridy = 0; gbc.gridwidth = 1; gbc.gridheight = 1; gbc.fill = GridBagConstraints.NONE; container.add(btn1, gbc); gbc.gridx = 1; container.add(panel1, gbc); gbc.gridx = 0; gbc.gridy = 1; gbc.gridwidth = 2; gbc.fill = GridBagConstraints.BOTH; gbc.weightx = 1.0; gbc.weighty = 0; container.add(btn2, gbc); gbc.gridx = 2; gbc.gridy = 0; gbc.gridwidth = 1; gbc.gridheight = 2; gbc.fill = GridBagConstraints.BOTH; gbc.weightx = 0; gbc.weighty = 0; container.add(btn3, gbc); gbc.gridx = 0; gbc.gridy = 2; gbc.gridwidth = 3; gbc.gridheight = 1; gbc.fill = GridBagConstraints.BOTH; gbc.weightx = 1.0; gbc.weighty = 1.0; container.add(panel2, gbc); GridLayout btnsLayout = new GridLayout(2, 3); panel2.setLayout(btnsLayout); panel2.add(new JButton("面板内的按钮1")); panel2.add(new JButton("面板内的按钮2")); panel2.add(new JButton("面板内的按钮3")); panel2.add(new JButton("面板内的按钮4")); panel2.add(new JButton("面板内的按钮5")); frame.setVisible(true); } }