FlowLayout布局

//JFrameClass.java
package flowLayout;
import java.awt.*;
import javax.swing.*;
public class JFrameClass extends JFrame{
	JButton[] button = new JButton[9];
	FlowLayout layout;
	public JFrameClass(){
		super("FlowLayout");
		String label;
		layout = new FlowLayout(FlowLayout.LEFT,10,10);
		getContentPane().setLayout(layout);
		for(int i=0;i<9;i++){
			label =""+(i+1)+"";
			button[i] = new JButton(label);
			getContentPane().add(button[i]);
		}
		setSize(320,150);
		setVisible(true);
		setResizable(false);
	}
}

//test.java
package flowLayout;
import javax.swing.*;

public class test {
	public static void main(String[] args){
		JFrameClass frame = new JFrameClass();
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}
}