GUI程式設計之Swing

阿新 • • 發佈：2021-06-24

視窗面板

package com.yeyue.lesson04;

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

public class JFrameDemo {

  //init() ;初始化
  public void init(){
    JFrame frame = new JFrame("這是一個JFrame視窗");
    frame.setVisible(true);
    frame.setBounds(100,100,200,200);
    frame.setBackground(Color.cyan);

    //設定文字
    JLabel label = new JLabel("歡迎來到哈哈哈哈哈");
    frame.add(label);

    //關閉事件
    frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
   }

  public static void main(String[] args) {
    //建立一個視窗
    new JFrameDemo().init();
   }
}

標籤居中

package com.yeyue.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.setBounds(10,10,200,300);
    this.setVisible(true);

    //設定文字
    JLabel label = new JLabel("歡迎來到");
    this.add(label);

    //讓標籤居中
    label.setHorizontalAlignment(SwingConstants.CENTER);

    //獲得一個容器
    Container container = this.getContentPane();
    container.setBackground(Color.YELLOW);
   }
}

彈窗

JDialog，用來被彈出，預設就有關閉事件

package com.yeyue.lesson04;

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

public class DialogDemo extends JFrame {

  public DialogDemo(){
    this.setVisible(true);
    this.setSize(700,500);
    this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

    //JFrame 放東西，容器
    Container container = this.getContentPane();
    //絕對佈局
    container.setLayout(null);

    //按鈕
    JButton button = new JButton("點選彈出一個對話窗");//建立
    button.setBounds(30,30,200,50);

    //點選這個按鈕的時候彈出一個彈窗
    button.addActionListener(new ActionListener() {
      @Override
      public void actionPerformed(ActionEvent e) {
        //彈窗
        new MyDialogDemo();
       }
     });

    container.add(button);

   }

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

//彈窗
class MyDialogDemo extends JDialog{
  public MyDialogDemo(){
    this.setVisible(true);
    this.setBounds(100,100,500,500);

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

    container.add(new Label("你好啊，我的朋友"));

   }
}

package com.yeyue.lesson04;

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

//圖示，需要實現類，Frame繼承
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 iconDemo = new IconDemo(15,15);
    //圖示放在標籤上，也可以在按鈕上
    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;
   }

}

圖片ICON

package com.yeyue.lesson04;

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

public class ImageIconDemo extends JFrame {

  //獲取圖片的地址
  public ImageIconDemo(){
    JLabel label = new JLabel("ImageIcon");
    URL url = ImageIconDemo.class.getResource("003.jpeg");

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

    Container container = getContentPane();
    container.add(label);
    setBounds(100,100,200,200);

    setVisible(true);
    setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
   }

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

面板

package com.yeyue.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)); //後邊的引數是間距

    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);

    this.setVisible(true);
    this.setSize(400,400);

    this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
   }

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

JScroll

package com.yeyue.lesson05;

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

public class JScrollDemo extends JFrame {

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

    //文字域
    JTextArea textArea = new JTextArea(20,50);
    textArea.setText("你好啊，我的朋友");

    //Scroll面板
    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();
   }
}

按鈕

圖片按鈕

package com.yeyue.lesson05;

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

public class JBottonDemo01 extends JFrame {

  public JBottonDemo01(){
    Container container = this.getContentPane();

    URL url = JBottonDemo01.class.getResource("003.jpeg");
    ImageIcon icon = new ImageIcon(url);

    JButton button = new JButton();
    button.setIcon(icon);
    button.setToolTipText("圖片按鈕");

    container.add(button);

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

   }

  public static void main(String[] args) {
    new JBottonDemo01();
   }
}

單選按鈕

package com.yeyue.lesson05;

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

public class JButtonDemo02 extends JFrame {

  public JButtonDemo02(){
    Container container = this.getContentPane();

    //單選框
    JRadioButton radioButton1 = new JRadioButton("radioButton1");
    JRadioButton radioButton2 = new JRadioButton("radioButton2");
    JRadioButton radioButton3 = new JRadioButton("radioButton3");

    //由於單選框只能選一個，分組
    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.setSize(500,500);
    this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

   }

  public static void main(String[] args) {
    new JButtonDemo02();
   }
}

複選按鈕

package com.yeyue.lesson05;

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

public class JButtonDemo03 extends JFrame {

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

    //多選框
    JCheckBox checkBox01 = new JCheckBox("checkBox01");
    JCheckBox checkBox02 = new JCheckBox("checkBox02");
    JCheckBox checkBox03 = new JCheckBox("checkBox03");

    container.add(checkBox01,BorderLayout.CENTER);
    container.add(checkBox02,BorderLayout.NORTH);
    container.add(checkBox03,BorderLayout.SOUTH);


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

   }

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

列表

下拉框

package com.yeyue.lesson06;

import javax.swing.*;
import java.awt.*;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.WindowAdapter;

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("即將上映");

    container.add(status);

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

   }


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


}

列表框

package com.yeyue.lesson06;

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

public class TestComboboxDemo02 extends JFrame {

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

    //生成列表的內容
    //String[] contents = {"1","2","3"};

    Vector contents = new Vector();

    //列表中需要放入內容
    JList jlist = new JList(contents);

    contents.add("你好");
    contents.add("啊");
    contents.add("朋友");

    container.add(jlist);

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

   }


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


}

應用場景
- 選擇地區，或者一些單個選項
- 列表，顯示資訊，一般是動態擴容

文字框

package com.yeyue.lesson06;

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

public class TestTextDemo01 extends JFrame {

  public TestTextDemo01(){
    Container container = this.getContentPane();

    JTextField textField1 = new JTextField("hello");
    JTextField textField2 = new JTextField("world",20);

    container.add(textField1,BorderLayout.NORTH);
    container.add(textField2,BorderLayout.SOUTH);
    
    this.setVisible(true);
    this.setSize(300,300);
    this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

   }
  
  public static void main(String[] args) {
    new TestTextDemo01();
   }
  
}

密碼框

package com.yeyue.lesson06;

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

public class TestTextDemo01 extends JFrame {

  public TestTextDemo01(){
    Container container = this.getContentPane();

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

    container.add(passwordField);

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

   }

  public static void main(String[] args) {
    new TestTextDemo01();
   }

}

文字域

package com.yeyue.lesson05;

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

public class JScrollDemo extends JFrame {

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

    //文字域
    JTextArea textArea = new JTextArea(20,50);
    textArea.setText("你好啊，我的朋友");

    //Scroll面板
    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();
   }
}

GUI程式設計之Swing

視窗面板 package com.yeyue.lesson04;import javax.swing.*;import java.awt.*;public class JFrameDemo {//init() ;初始化public void init(){JFrame frame = new JFrame(\"這是一個JFrame視窗\");frame.se