GUI编程(六)按钮、列表及文本框

3.5、按钮

图片按钮

package com.study.lesson05;

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

public class JButtonDemo01 extends JFrame{

        public JButtonDemo01() throws HeadlessException {
            //京一个图片变为图标
            Container container = this.getContentPane();
            URL resource = JButtonDemo01.class.getResource("tx.jpg");
            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.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
            this.setSize(500,300);


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

• 单选按钮

  package com.study.lesson05;
  
  import javax.swing.*;
  import java.awt.*;
  import java.net.URL;
  
  public class JButtonDemo02 extends JFrame {
  
      public JButtonDemo02() {
          //将一个图片变为图标
          Container container = this.getContentPane();
          //URL resource = JButtonDemo01.class.getResource("tx.jpg");
          //Icon icon = new ImageIcon(resource);
  
  
          //单选框
          JRadioButton radioButton1 = new JRadioButton("JRadioButton01");
          JRadioButton radioButton2 = new JRadioButton("JRadioButton02");
          JRadioButton radioButton3 = 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(radioButton1);
          group.add(radioButton2);
          group.add(radioButton3);
  
          container.add(radioButton1,BorderLayout.CENTER);
          container.add(radioButton2,BorderLayout.NORTH);
          container.add(radioButton3,BorderLayout.SOUTH);
  
          this.setVisible(true);
          this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
          this.setSize(500,300);
  
  
      }
      public static void main(String[] args) {
          new JButtonDemo02();
      }
  }
  
  
  

  

• 复选按钮

  package com.study.lesson05;
  
  import javax.swing.*;
  import java.awt.*;
  import java.net.URL;
  
  public class JButtonDemo03 extends JFrame {
  
      public JButtonDemo03() {
          //将一个图片变为图标
          Container container = this.getContentPane();
          //URL resource = JButtonDemo01.class.getResource("tx.jpg");
          //Icon icon = new ImageIcon(resource);
  
  
          //多选框
          JCheckBox jCheckBox01 = new JCheckBox("JCheckBox01");
          JCheckBox jCheckBox02 = new JCheckBox("JCheckBox02");
  
          container.add(jCheckBox01,BorderLayout.NORTH);
          container.add(jCheckBox02,BorderLayout.SOUTH);
  
  
  
          this.setVisible(true);
          this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
          this.setSize(500,300);
  
  
      }
      public static void main(String[] args) {
          new JButtonDemo03();
      }
  }
  
  
  

  

3.6、列表

• 下拉框

  package com.study.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("正字热映");
          status.addItem("已下架");
          status.addItem("即将上映");
  
          container.add(status);
  
          this.setVisible(true);
          this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
          this.setSize(500,350);
      }
  
  
      public static void main(String[] args) {
          new TestComboboxDemo01();
      }
  }
  
  

  

• 列表框

package com.study.lesson06;

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

public class TestComboboxDemo02 extends JFrame {
    public TestComboboxDemo02(){

        Container container = this.getContentPane();

        //生成列表内容
        //String[] contents = {"1","2","3"};

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

        contents.add("张三");
        contents.add("李四");
        contents.add("王五");

        container.add(jList);


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


    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，一般是动态扩容。

3.7、文本框

• 文本框

  package com.study.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("正字热映");
          status.addItem("已下架");
          status.addItem("即将上映");
  
          container.add(status);
  
          this.setVisible(true);
          this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
          this.setSize(500,350);
      }
  
  
      public static void main(String[] args) {
          new TestComboboxDemo01();
      }
  }
  
  

  

• 密码框

  package com.study.lesson06;
  
  import javax.swing.*;
  import java.awt.*;
  
  public class TestTextDemo02 extends JFrame {
      public TestTextDemo02(){
  
          Container container = this.getContentPane();
  
          //面板
  
          JPasswordField passwordField = new JPasswordField();//****
          passwordField.setEchoChar('*');
  
          container.add(passwordField);
  
          this.setVisible(true);
          this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
          this.setSize(500,350);
      }
  
  
      public static void main(String[] args) {
          new TestTextDemo02();
      }
  }
  
  
  

• 文本域

package com.study.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");

        //Scroll面板
        JScrollPane scrollPane = new JScrollPane(textArea);
        container.add(scrollPane);

        this.setVisible(true);
        this.setBounds(100,100,300,150);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }


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