/**
*
*/
private JPanel contentPane;
private static final long serialVersionUID = -4948295198859299320L;

public static void main(String []args){
try {
UIManager.setLookAndFeel("com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel");// 修改窗体的外观为Nimbus
} catch (Throwable e) {
// TODO: handle exception
e.printStackTrace();
}

EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
try {
MyJFrame frame = new MyJFrame();
frame.setVisible(true);

// frame.AbsoluteLayoutDemo();
// frame.FlowLayoutDemo();
// frame.BorderLayoutDemo();
frame.GirdLayoutDemo();

} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
}
});
}

public MyJFrame(){
setTitle("最简单的窗体");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100,100,250,100);
}

// 绝对布局管理
public void AbsoluteLayoutDemo(){
setTitle("绝对布局");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); // 设置应用退出模式,退出时关闭

setBounds(100, 100, 250, 100); // 设置窗体的大小和位置
contentPane = new JPanel(); // 创建内容面板
contentPane.setBorder(new EmptyBorder(5,5,5,5)); // 设置内容面板边框
setContentPane(contentPane); // 使用内容面板
contentPane.setLayout(null);// 设置布局管理器为null

JButton btn1 = new JButton("按钮-1");
btn1.setBounds(6, 9, 90, 30);
contentPane.add(btn1);
btn1.setBackground(Color.GREEN);


JButton btn2 = new JButton("按钮-2");
btn2.setBounds(96, 39, 90, 30);
btn2.setBackground(Color.RED);
contentPane.add(btn2);
}
// 流式布局管理,根据内容面板的变化，排列也发生变化
public void FlowLayoutDemo(){
setTitle("流式布局");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 300, 150);

contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
contentPane.setLayout(new FlowLayout()); //设置为流式布局

for (int i = 1; i < 11; i++) {
JButton btn = new JButton("按钮"+i);
contentPane.add(btn);
}
}

// 边界布局管理,指定各自的方位
public void BorderLayoutDemo(){
setTitle("边界布局");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100,100,450,300);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
contentPane.setLayout(new BorderLayout());// 设置内容面板的布局管理器为边界布局
setContentPane(contentPane);// 应用内容面板

JButton westBtn = new JButton("西部");
contentPane.add(westBtn, BorderLayout.WEST);

JButton eastBtn = new JButton("东部");
contentPane.add(eastBtn, BorderLayout.EAST);

JButton northBtn = new JButton("北部");
contentPane.add(northBtn, BorderLayout.NORTH);

JButton southBtn = new JButton("南部");
contentPane.add(southBtn, BorderLayout.SOUTH);

JButton centerBtn = new JButton("中部");
contentPane.add(centerBtn, BorderLayout.CENTER);
}

// 网格布局管理器,按照从左到右，从上到下 的 “行*列”布局一次排列
public void GirdLayoutDemo(){
setTitle("网格布局");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100,100,450,300);
contentPane = new JPanel();
contentPane.se