GUI - study（四）

Swing

1.窗口、面板

package com.kuang.lesson04;

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

public class TestJFrameDemo {
    //顶级窗口
    //init();//初始化
    public void init(){
        JFrame jf = new JFrame("这是一个jframe窗口");
        jf.setVisible(true);
        jf.setBounds(100,100,200,200);
        jf.setBackground(Color.blue);

        //设置文字JLable
        JLabel label = new JLabel("欢迎来到狂神说java");
        jf.add(label);

        //关闭事件
        jf.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }
    public static void main(String[] args) {
        //建立一个窗口
        new TestJFrameDemo().init();

    }
}

标签居中

package com.kuang.lesson04;

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

public class JFrameDemo02 {
    public static void main(String[] args) {
        new MyJFrame2().init();
    }
}

class MyJFrame2 extends JFrame{
    public void init(){
        this.setVisible(true);
        //this.setBounds(10,10,200,300);
        this.pack();
        JLabel label = new JLabel("huanyinglaidao");
        this.add(label);

        //让文本标签居中，设置水平对齐
        label.setHorizontalAlignment(SwingConstants.CENTER);

        //获得一个容器
        Container container = this.getContentPane();
        container.setBackground(Color.CYAN);
    }
}

2.弹窗

package com.kuang.lesson04;

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

//主窗口
public class DialogDemo extends JFrame {
    public DialogDemo(){
        this.setVisible(true);
        this.setSize(700,900);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

        //JFrame 放东西，容器
        Container container = this.getContentPane();
        //绝对布局
        container.setLayout(null);
        //按钮
        JButton button = new JButton("点击弹出一个对话框");
        button.setBounds(30,30,200,50);
        //点击这个按钮的时候，弹出一个弹窗
        button.addActionListener(new ActionListener() {  //***
            @Override
            public void actionPerformed(ActionEvent e) {
                //弹窗
                new MyDialogDemo();
            }
        });

        container.add(button);
    }

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

//弹窗的窗口
class MyDialogDemo extends JDialog{
    public MyDialogDemo() {
        this.setVisible(true);
        this.setBounds(100,100,500,500);
        //this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

        Container container = this.getContentPane();
        container.setLayout(null);

        container.add(new Label("秦老师带你学java"));
    }
}

3.标签label

new JLabel("xxx");

图标ICON

package com.kuang.lesson04;

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

//图标是一个接口，需要实现类，Frame继承
public class IconDemo extends JFrame implements Icon{
    private int width;
    private int height;

    public IconDemo(){//无参构造

    }

    public IconDemo(int width,int height){//全参构造
        this.width = width;
        this.height = height;


    }

    public void init(){
        IconDemo iconDemo = new IconDemo(15, 15);
        //图标放在标签上，也可以放在按钮上
        JLabel label = new JLabel("icontest", iconDemo, SwingConstants.CENTER);

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

        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

package com.kuang.lesson04;

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

public class ImageIconDemo extends JFrame{

    public ImageIconDemo(){
        //获取当前类下面资源图片的地址
        JLabel label = new JLabel("ImageIcon");
        URL url = ImageIconDemo.class.getResource("smallsun.png");

        ImageIcon imageIcon = new ImageIcon(url);//命名不要冲突
        label.setIcon(imageIcon);
        label.setHorizontalAlignment(SwingConstants.CENTER);

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

        setVisible(true);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        setBounds(100,100,200,200);
    }

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

4.面板

JPanel

package com.kuang.lesson05;

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

public class JPanelDemo extends JFrame{
    public JPanelDemo(){
        Container container = this.getContentPane();

        container.setLayout(new GridLayout(2,1,10,10)); //后面的参数间距

        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));

        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"));

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

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

    }

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

JScrollPanell 滚动条

package com.kuang.lesson05;

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

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

        //文本域
        JTextArea textArea = new JTextArea(20,50);
        textArea.setText("欢迎学习GUI");
        //Scroll面板
        JScrollPane scrollPane = new JScrollPane(textArea);
        container.add(scrollPane);

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

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

5.按钮

图片按钮

package com.kuang.lesson05;

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

public class JButtonDemo01 extends JFrame{
    public JButtonDemo01(){
        Container container = this.getContentPane();

        //将一个图片变成图标
        URL resource = JButtonDemo01.class.getResource("smallsun.png");
        Icon icon = new ImageIcon(resource);

        //把这个图标放在按钮上
        JButton button = new JButton();
        button.setIcon(icon);
        button.setToolTipText("图片按钮");

        //add
        container.add(button);

        this.setVisible(true);
        this.setSize(500,300);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new JButtonDemo01();
    }
}

• 单选按钮

• package com.kuang.lesson05;
  import javax.swing.*;
  import java.awt.*;
  import java.net.*;
  
  public class JButtonDemo02 extends JFrame{
      public JButtonDemo02(){
          Container container = this.getContentPane();
  
          //将一个图片变成图标
          URL resource = JButtonDemo02.class.getResource("smallsun.png");
          Icon icon = new ImageIcon(resource);
  
          //单选框
          JRadioButton radioButton01 = new JRadioButton("JRadioButton01");
          JRadioButton radioButton02 = new JRadioButton("JRadioButton02");
          JRadioButton radioButton03 = new JRadioButton("JRadioButton03");
  
          //由于单选框只能选择一个，分组，一个组中只能选一个
          ButtonGroup group = new ButtonGroup();
          group.add(radioButton01);
          group.add(radioButton02);
          group.add(radioButton03);
  
          container.add(radioButton01,BorderLayout.CENTER);
          container.add(radioButton02,BorderLayout.NORTH);
          container.add(radioButton03,BorderLayout.SOUTH);
  
          this.setVisible(true);
          this.setSize(500,300);
          this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
      }
  
      public static void main(String[] args) {
              new JButtonDemo02();
      }
  }

• 复选按钮

package com.kuang.lesson05;

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

public class JButtonDemo03  extends JFrame {
    public JButtonDemo03(){
        Container container = this.getContentPane();

        //将一个图片变成图标
        URL resource = JButtonDemo02.class.getResource("smallsun.png");
        Icon icon = new ImageIcon(resource);

        //多选框
        JCheckBox checkBox01 = new JCheckBox("checkBox01");
        JCheckBox checkBox02 = new JCheckBox("checkBox02");

        container.add(checkBox01,BorderLayout.NORTH);
        container.add(checkBox02,BorderLayout.SOUTH);

        this.setVisible(true);
        this.setSize(500,300);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new JButtonDemo03();
    }
}

6.列表

• 下拉框

  package com.kuang.lesson06;
  
  import javax.swing.*;
  import java.awt.*;
  
  public class TestComboboxDemo01 extends JFrame {
      public TestComboboxDemo01(){
          Container container = this.getContentPane();
  
          JComboBox status = new JComboBox();
  
          status.addItem(null);
          status.addItem("正在上映");
          status.addItem("已下架");
          status.addItem("即将上映");
  
          //status.addActionListener();
  
          container.add(status);
  
  
  

      this.setVisible(true);
      this.setSize(500,350);
      this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
  }

  public static void main(String[] args) {
      new TestComboboxDemo01();
  }

}

- 列表框

```java
package com.kuang.lesson06;
//静态
import javax.swing.*;
import java.awt.*;

public class TestComboboxDemo02 extends JFrame {
    public TestComboboxDemo02(){
        Container container = this.getContentPane();

        //生成列表的内容   稀疏数组，压缩数据
        String[] contents = {"1","2","3"};
        //列表中需要放入的内容
        JList jList = new JList(contents);

        container.add(jList);

        this.setVisible(true);
        this.setSize(500,350);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new TestComboboxDemo02();
    }
}


//动态
package com.kuang.lesson06;

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

public class TestComboboxDemo02 extends JFrame {
    public TestComboboxDemo02(){
        Container container = this.getContentPane();

        //生成列表的内容   稀疏数组，压缩数据
        //String[] contents = {"1","2","3"};
        Vector<Object> contents = new Vector();

        //列表中需要放入的内容
        JList jList = new JList(contents);

        contents.add("1");
        contents.add("2");
        contents.add("3");
        contents.add("4");

        container.add(jList);

        this.setVisible(true);
        this.setSize(500,350);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new TestComboboxDemo02();
    }
}

• 应用场景

  • 选择地区或者一些单个选项

  • 列表，展示信息，一般动态扩容！

7.文本框

• 文本框

  package com.kuang.lesson06;
  
  import javax.swing.*;
  import java.awt.*;
  import java.util.Vector;
  
  public class TestTextDemo01 extends JFrame {
      public TestTextDemo01(){
          Container container = this.getContentPane();
          //container.setLayout(null);
  
          JTextField textField = new JTextField("hello");
          JTextField textField2 = new JTextField("world",20);
  
          container.add(textField,BorderLayout.NORTH);
          container.add(textField2,BorderLayout.SOUTH);
  
          this.setVisible(true);
          this.setSize(500,350);
          this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
      }
  
      public static void main(String[] args) {
          new TestTextDemo01();
      }
  }

• 密码框

package com.kuang.lesson06;

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

public class TestTextDemo03 extends JFrame {
    public TestTextDemo03(){
        Container container = this.getContentPane();

        //面板
        JPasswordField passwordField = new JPasswordField();  //****
        passwordField.setEchoChar('*');

        container.add(passwordField);



        this.setVisible(true);
        this.setSize(500,350);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new TestTextDemo03();
    }
}

• 文本域

  package com.kuang.lesson05;
  import javax.swing.*;
  import java.awt.*;
  public class JScrollDemo extends JFrame{
    public JScrollDemo(){
        Container container = this.getContentPane();
  
        //文本域
        JTextArea textArea = new JTextArea(20,50);
        textArea.setText("欢迎学习GUI");
        //Scroll面板
        JScrollPane scrollPane = new JScrollPane(textArea);
        container.add(scrollPane);
  
        this.setVisible(true);
        this.setBounds(100,100,300,350);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }
  
    public static void main(String[] args) {
        new JScrollDemo();
    }
  }