【Java_GUI编程】--基本操作你要知道（二）

package www.qyl.lesson01;
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class TestActionEvent {
    public static void main(String[] args) {
        JFrame jFrame = new JFrame();
        jFrame.setBounds(10,10,300,300);
        jFrame.setVisible(true);
        JTextField jTextField = new JTextField("test:");
        jFrame.getContentPane().add(jTextField);
        jTextField.addActionListener(new MyActionEvent());
    }
}
class MyActionEvent implements ActionListener{
    @Override
    public void actionPerformed(ActionEvent e) {
        JTextField jTextField = (JTextField)e.getSource(); //获得一些资源、返回一个对象
        System.out.println(jTextField.getText());   //获得输入框中的内容
        jTextField.setText("");     //设置输入框为 null
    }
}

package www.qyl.lesson01;
import javax.swing.*;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
public class TestKeyListener {
    public static void main(String[] args) {
        new KeyFrame();
    }
}
class KeyFrame extends JFrame{
    public KeyFrame(){
        setBounds(10,10,300,300);
        setVisible(true);
        this.addKeyListener(new KeyListener() {
            @Override
            public void keyTyped(KeyEvent e) {
            }
            @Override
            public void keyPressed(KeyEvent e) {
                int keycode = e.getKeyCode();  //获得键盘按下的哪一个键
                System.out.println(keycode);  //打印目前按下的键（会输出一个静态属性值）
                if (keycode == KeyEvent.VK_SPACE){   //键盘上每个健对应一个静态属性值：VK_XX
                    System.out.println("你按下了空格");
                }
            }
            @Override
            public void keyReleased(KeyEvent e) {
            }
        });
    }
}

package www.qyl.lesson01;
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class TestDialog {
    public static void main(String[] args) {
        JFrame jFrame = new JFrame();
        jFrame.setVisible(true);
        jFrame.setBounds(10,10,300,300);
        JButton button = new JButton("button1");
        jFrame.getContentPane().add(button);
        button.addActionListener(new MyAction1());
    }
}
class MyAction1 implements ActionListener{
    @Override
    public void actionPerformed(ActionEvent e) {
        new MyDialogDemo();
    }
}
class MyDialogDemo {
    public MyDialogDemo(){
        JDialog jDialog = new JDialog();
        jDialog.setVisible(true);
        jDialog.setBounds(100,100,300,300);
    }
}

package www.qyl.lesson02;
import javax.swing.*;
import java.awt.*;
public class IconDemo extends JFrame implements Icon {
    private int width,height;
    public IconDemo(){
    }
    public IconDemo(int width,int height){
        this.width = width;
        this.height = height;
    }
    public void init(){
        IconDemo iconDemo = new IconDemo(15,15);
        JLabel label = new JLabel("icontest",iconDemo,SwingConstants.CENTER);
        Container container = getContentPane();
        container.add(label);
        this.setBounds(50,50,100,100);
        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);   //g:是画笔，g.fillOval画出一个图形
    }
    @Override
    public int getIconWidth() {
        return this.width;
    }
    @Override
    public int getIconHeight() {
        return this.height;
    }
}

package www.qyl.lesson02;
import com.sun.jndi.toolkit.url.UrlUtil;
import javax.swing.*;
import java.awt.*;
import java.net.URL;
public class ImageIconDemo extends JFrame {
    public ImageIconDemo(){
        JLabel label = new JLabel("ImageIcon");
        URL url = ImageIconDemo.class.getResource("hhy.png");  //获取本类路径下的图片路径，获取图片路径
        ImageIcon imageIcon = new ImageIcon(url);
        label.setIcon(imageIcon);
        Container container = getContentPane();
        container.add(label);
        setVisible(true);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        setBounds(20,20,300,300);
    }
    public static void main(String[] args) {
        new ImageIconDemo();
    }
}

package www.qyl.lesson02;
import javax.swing.*;
public class TestradioBttton {
    public static void main(String[] args) {
        JFrame jf = new JFrame();
        jf.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        jf.setBounds(10,10,300,300);
        jf.setVisible(true);
        JPanel jPanel = new JPanel();
jRadioButtonJiZhuPass.isSelected()
        JRadioButton jradio1 = new JRadioButton("男");
        JRadioButton jradio2 = new JRadioButton("女");
        //单选只能选择一个所以需要分组，一个组中只能选择一个
        ButtonGroup group = new ButtonGroup();
        group.add(jradio1);
        group.add(jradio2);
        //判断是否选中单选框
         System.out.println(jradio1.isSelected());  //返回Boolean类型
        jPanel.add(jradio1);
        jPanel.add(jradio2);
        jf.add(jPanel);
    }
}