1.在电子相册程序界面中包含“上一张”和“下一张”,按钮和相册图片
2.点击“上一张”或者“下一张”按钮均可切换相册图片
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.UIManager;
public class Photo extends JFrame implements ActionListener {
  JButton b1,b2,b3;//声明组件
	int i = 0;//定义变量记录图片编号
	String[] img = {"01.jpg","02.jpg","03.jpg","04.jpg"};//定义图片名称数组
	public Photo(){
		b1 = new JButton("上一张");//示例化组件
		
		b1.addActionListener(this);
        b2 = new JButton("下一张");
        b2.addActionListener(this);
        b3 = new JButton("",new ImageIcon("C:/"+img[i]));
        this.add(b1,BorderLayout.WEST);
        this.add(b2,BorderLayout.EAST);
        this.add(b3);
//设置JFrame容器属性
        this.setTitle("电子相册");
        this.setSize(400, 300);
        this.setVisible(true);
	}
	
	public static void main(String[] args) {
		// TODO Auto-generated method stub
     try{
//设置记事本的风格与当前系统风格一致
    	 UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
     }catch(Exception e){
    	 e.printStackTrace();
     }
     new Photo();
	}
	@Override
	public void actionPerformed(ActionEvent e) {
		// TODO Auto-generated method stub
		if(e.getSource()==b1){//判断点击上一张按钮
			i = i-1<0?3:i-1;//判断图片编号的值
			b3.setIcon(new ImageIcon("C:/l"+img[i]));
		}else if(e.getSource()==b2){//判断点击下一张按钮
			i=i+1>3?0:i+1;//判断图片编号的值
			b3.setIcon(new ImageIcon("C:/"+img[i]));
    }
  }
}
原文:https://www.cnblogs.com/tianyating/p/9128537.html