3.3 -3.4 标签+面板-2022-12-12

3.3 标签-

      new  Labe("XXX");

      图标

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

public class IconDemo extends JFrame implements Icon {

    private int width;
    private int height;
    public IconDemo(){};

    public IconDemo(int width,int height){
        this.width= width;
        this.height = height;
    }

    public void init(){
        IconDemo icon1 = new IconDemo(150, 150);
        //图标放标签，也可以放按钮上
        JLabel label = new JLabel("icontest", icon1, SwingConstants.CENTER);

        Container container = getContentPane();
        container.setBackground(Color.RED);
        container.add(label);
        this.setBounds(100,100,500,400);
        this.setVisible(true);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new IconDemo().init();
    }

    @Override
    public void paintIcon(Component c, Graphics g, int x, int y) {
        g.fillOval(x,y,width,height);
    }

    @Override
    public int getIconWidth() {
        return this.width;
    }

    @Override
    public int getIconHeight() {
        return this.height;
    }
}

 

      图片ICON(需要把图片资源拉到IDEA的SRC根目录下)

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

public class ImageIconDemo extends JFrame {

    public ImageIconDemo() {
        // 获取图片地址
        JLabel label = new JLabel("ImageIcon");
        URL url = ImageIconDemo.class.getResource("tx.jpg");

        ImageIcon imageIcon = new ImageIcon(url);
        label.setIcon(imageIcon);
        label.setHorizontalAlignment(SwingConstants.CENTER);

        Container container = getContentPane();
        container.add(label);

        setVisible(true);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        setBounds(100,100,600,600);
    }

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

3.4 面板

package Lesson05;

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

class JPanelDemo01 extends JFrame{

    public JPanelDemo01() {
        Container container = this.getContentPane();
        container.setLayout(new GridLayout(4,2 ,10,10)); //后面两个参数为间距

        JPanel panel1 = new JPanel(new GridLayout(1,3));
        JPanel panel2 = new JPanel(new GridLayout(1,2));
        JPanel panel3 = new JPanel(new GridLayout(2,1));
        JPanel panel4 = new JPanel(new GridLayout(3,2));
        JPanel panel5 = new JPanel(new GridLayout(1,1));


        panel1.add(new JButton("1"));
        panel1.add(new JButton("1"));
        panel1.add(new JButton("1"));
        panel2.add(new JButton("2"));
        panel2.add(new JButton("2"));
        panel3.add(new JButton("3"));
        panel3.add(new JButton("3"));
        panel4.add(new JButton("4"));
        panel4.add(new JButton("4"));
        panel4.add(new JButton("4"));
        panel4.add(new JButton("4"));
        panel4.add(new JButton("4"));
        panel4.add(new JButton("4"));
        panel5.add(new JButton("5"));


        container.add(panel1);
        container.add(panel2);
        container.add(panel3);
        container.add(panel4);
        container.add(panel5);

        this.setVisible(true);
        this.setSize(500,500);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new JPanelDemo01();
    }
}

滚动条面板 ScrollPanel

package Lesson05;

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

public class JScrollDemo extends JFrame {

    public JScrollDemo(){
        Container container = this.getContentPane();

        //文本域
        TextArea textArea = new TextArea(20, 50);
        textArea.setText("欢迎学习JAVA");

        JScrollPane jScrollPane = new JScrollPane(textArea);
        container.add(jScrollPane);

        this.setVisible(true);
        this.setBounds(100,100,300,350);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

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