绝对布局（需要自定义每个原件的位置）

public class AbsolutePosition extends JFrame{

    public AbsolutePosition() {
        // TODO Auto-generated constructor stub
    setTitle("本窗口使用绝对布局");
    setLayout(null);
    setBounds(0,0,200,150);
    Container c = getContentPane();
    JButton b1 = new JButton("按钮1");
    JButton b2 = new JButton("按钮2");
    b1.setBounds(10,30,80,30);
    b2.setBounds(60,70,100,20);
    c.add(b1);
    c.add(b2);
    setVisible(true);
    setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }
    public static void main(String[] args) {
        // TODO Auto-generated method stub\
        new AbsolutePosition();
    }
}