Question

java面板中设置gridlayout怎么使用JScrollPane才能显示出来

public class MidaPlayerKnoledge extends JFrame {
public MidaPlayerKnoledge() {
super("TestJScrollPane");
this.setLayout(new GridLayout(2,1));
this.setBounds(200, 200, 300, 300);
JPanel panel = new JPanel();
panel.setPreferredSize(new Dimension(200,100));

JScrollPane scrollPane = new JScrollPane(panel);
scrollPane.setBounds(10, 10, 175, 70);
JPanel panel1= new JPanel();
this.getContentPane().add(scrollPane);
this.getContentPane().add(panel1);
this.setVisible(true);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

}
public static void main(String[] args) {
new MidaPlayerKnoledge();
}

}

Answer 1

lz  你好

给你一个简单的例子吧

import java.awt.*;
import javax.swing.*;

public class MidaPlayerKnoledge extends JFrame {
	public MidaPlayerKnoledge() {
		 super("TestJScrollPane");
		 this.setLayout(new GridLayout(2,1));
		 this.setBounds(200, 200, 300, 300);
		 JPanel panel = new JPanel(new GridLayout(20,5));
		 
		 //加一些标签  就能显示了
		 JLabel[] num = new JLabel[100];
		 for (int i = 0; i < num.length; i++) {
                    num[i] = new JLabel(""+(i+1));
                    panel.add(num[i]);
           	 }
           	 //panel.setPreferredSize(new Dimension(200,100));
		 //这段代码去掉  否则会乱码  在GridLayout下不能设置组件的大小
		 
		 JScrollPane scrollPane = new JScrollPane(panel);
		 scrollPane.setBounds(10, 10, 175, 70);
		 JPanel panel1= new JPanel();
		 this.getContentPane().add(scrollPane);
		 this.getContentPane().add(panel1);
		 this.setVisible(true);
		 this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

		}
		public static void main(String[] args) {
		 new MidaPlayerKnoledge();
		}

}

希望能帮助你哈