62.【GUI编程】（三）

1.键盘事件:KeyListener
2.鼠标事件:MouseListener
3.窗口WindowListener

package KuangStudy;
import java.awt.*;
public class Test {
    public static void main(String[] args) {
        Frame frame=new Frame("傻子");
        frame.setSize(700,500);
        Student student=new Student();
        frame.setBackground(Color.CYAN);
        frame.add(student);
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
}
}

package KuangStudy;
import java.awt.*;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
public class Student extends Panel  {
    public Student (){
        this.addMouseListener(new MouseAdapter() {
            @Override
            public void mousePressed(MouseEvent e) {
                System.out.println("您点击了"+e.getX()+","+e.getY());
            }
        });
    }
    public void paint(Graphics g){
        g.fillOval(200,200,100,100);
        Color c=new Color(255,5,5);
        g.setColor(c);
    }
    }

基本思路:
1.如果想要多个数据同时存储在画板上，那么我们就需要使用数组的操作
进行储存位置。
2.ArrayList : 进行集合的储存操作
3.MouseListener 鼠标事件

package KuangStudy;
import java.awt.*;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.util.ArrayList;
public class Student extends Panel  {
    ArrayList<Integer> arrayList_x=new ArrayList();
    ArrayList <Integer>arrayList_y=new ArrayList();
    int x;
    int y;
    public Student (){
        this.addMouseListener(new MouseAdapter() {
            @Override
            public void mousePressed(MouseEvent e) {
                x=e.getX();
                y=e.getY();
                arrayList_x.add(x);
                arrayList_y.add(y);
                System.out.println("您点击了"+e.getX()+","+e.getY());
                repaint();
            }
        });
    }
    public void paint(Graphics g){
        Color c=new Color(255,5,5);
        g.setColor(c);
        for (int i = 0; i <arrayList_x.size(); i++) {
            g.fillOval(arrayList_x.get(i),arrayList_y.get(i),10,10);
        }
    }
}

package KuangStudy;
import java.awt.*;
import java.awt.event.ActionListener;
import java.util.ArrayList;
public class Test {
    public static void main(String[] args) {
        Frame frame=new Frame("傻子");
        frame.setSize(700,500);
        Student student=new Student();
        frame.setBackground(Color.CYAN);
        frame.add(student);
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
}
}

基本思路:
1.窗体关闭
this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
2.把标签的位置放到中间
label_one.setHorizontalAlignment(SwingConstants.CENTER);

package KuangStudy;
import javax.swing.*;
public class first extends JFrame {
    public first(){
        this.setSize(300,300);
        this.setLocationRelativeTo(null);
        this.setTitle("JFrame");
        this.setVisible(true);
        JLabel label_one=new JLabel("欢迎来到我的世界");
        this.add(label_one);
        //把标签的位置放到中间
        label_one.setHorizontalAlignment(SwingConstants.CENTER);
        //关闭事件的操作
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }
}

package KuangStudy;
public class Test {
    public static void main(String[] args) {
        first first_one=new first();
}
}

基本思路:
1.弹窗 JDialog 也是一个窗口，也需要设置相应的大小，宽高，展现
（有默认的关闭事件，不用再次添加）
JDialog jDialog_one=new JDialog();
2.按钮: 按钮也能进行位置和大小的设置
 button_dialog.setBounds(30,30,50,50);

package KuangStudy;
import javax.swing.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class first extends JFrame {
    public first(){
        this.setSize(300,300);
        this.setLocationRelativeTo(null);
        this.setTitle("JFrame");
        this.setVisible(true);
        //把其添加到窗体中
        JLabel label_one=new JLabel("欢迎来到我的世界ya");
        this.add(label_one);
        //把文本放到中间的位置
        label_one.setHorizontalAlignment(SwingConstants.CENTER);
        //关闭事件的操作
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        JButton button_dialog=new JButton("点我弹窗");
        //为按钮设置长和宽以及位置
        button_dialog.setBounds(30,30,50,50);
        this.add(button_dialog);
        //添加按钮事件的适配器
        button_dialog.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                JDialog jDialog_one=new JDialog();
                jDialog_one.setBounds(100,100,100,100);
               jDialog_one.add(label_one);
                jDialog_one.setVisible(true);
                //JOptionPane.showMessageDialog(null,"yes");
            }
        });
    }
}

package KuangStudy;
public class Test {
    public static void main(String[] args) {
        first first_one=new first();
}
}

基本思路:
1. Icon 是一个接口
2. 具体实现:需要在第一个方法中，填写腰围和什么图形
3. 声明图标以及水平线的位置.
4. JLabel jLabel_one=new JLabel("是我呀",first_one（实现接口的对象）,SwingConstants.CENTER);
5. 这里没有定义x,y的具体位置

package KuangStudy;
import javax.swing.*;
import java.awt.*;
public class first extends JFrame implements Icon {
    private  int width;
    private int height;
    public first(){
    }
    public first(int width,int height){
        this.width=width;
        this.height=height;
    }
    //运用方法对其进行初始化的操作
    public void init(){
        //设置宽度
       first first_one=new first(50,50);
       //设置图片标签
       JLabel jLabel_one=new JLabel("是我呀",first_one,SwingConstants.CENTER);
       this.add(jLabel_one);
    }
    //进行绘画
    @Override
    public void paintIcon(Component c, Graphics g, int x, int y) {
        g.fillOval(x,y,width,height);
    }
    //返回宽度
    @Override
    public int getIconWidth() {
        return this.width;
    }
    //返回高度
    @Override
    public int getIconHeight() {
        return this.height;
    }
}

package KuangStudy;
public class Test {
    public static void main(String[] args) {
        first first_one=new first();
        first_one.init();
        first_one.setSize(500,500);
        first_one.setLocationRelativeTo(null);
        first_one.setVisible(true);
}
}