图形化用户界面-java头歌实训

图形化用户界面

java 复制代码

import java.awt.*;  
import javax.swing.*;  
  
public class GraphicsTester extends JFrame {  
  
    public GraphicsTester() {  
        super("Graphics Demo");  
        setSize(480, 300);  
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);  
    }  
  
    public void paint(Graphics g) {  
        super.paint(g);  
        g.setFont(new Font("Serif", Font.BOLD, 12)); // 字体Serif，粗体，12号  
        g.setColor(Color.BLUE);  
        g.drawString("Hello, World!", 20, 50); // 在(20, 50)位置绘制字符串  
  
        g.setFont(new Font("Serif", Font.ITALIC, 14)); // 字体Serif，斜体，14号  
        g.setColor(Color.RED);  
        g.drawString("Graphics Demo", 250, 50); // 在(250, 50)位置绘制字符串  
  
        // 绘制直线  
        g.setColor(Color.GREEN);  
        g.drawLine(50, 100, 150, 100); // 从(50, 100)到(150, 100)绘制直线  
  
        // 绘制空心矩形  
        g.setColor(Color.BLACK);  
        g.drawRect(170, 50, 100, 50);  
  
        // 绘制实心矩形  
        g.setColor(Color.YELLOW);  
        g.fillRect(170, 120, 100, 50);  
        g.setColor(Color.CYAN);  

        g.drawRoundRect(200, 120, 100, 50, 20, 20); // 在(200, 120)位置绘制一个带圆角的空心矩形  
  
        // 绘制实心圆角矩形  
        g.setColor(Color.MAGENTA);  
        g.fillRoundRect(200, 180, 100, 50, 20, 20); // 在(200, 180)位置绘制一个带圆角的实心矩形  
        // 绘制标准矩形模拟3D效果（没有真正的draw3DRect和fill3DRect方法）  
        g.setColor(Color.LIGHT_GRAY);  
        g.fillRect(50, 50, 100, 50); // 底部颜色  
        g.setColor(Color.GRAY);  
        g.drawRect(50, 50, 100, 50); // 边缘颜色，模拟阴影效果  
  
        // 绘制空心椭圆  
        g.setColor(Color.BLUE);  
        g.drawOval(50, 190, 100, 50);  
  
        // 绘制实心椭圆  
        g.setColor(Color.GREEN);  
        g.fillOval(170, 190, 100, 50);  
  
        // 绘制圆弧  
        g.setColor(Color.RED);  
        g.drawArc(50, 260, 100, 50, 45, 180); // 从45度开始，画180度的圆弧  
  
        // 绘制扇形  
        g.setColor(Color.PINK);  
        g.fillArc(170, 260, 100, 50, 0, 90); // 从0度开始，画90度的扇形  
  
        // 绘制多边形  
        int[] xPoints = {50, 100, 100, 50};  
        int[] yPoints = {20, 20, 70, 70};  
        int nPoints = 4;  
        g.setColor(Color.ORANGE);  
        g.drawPolygon(xPoints, yPoints, nPoints); // 绘制空心多边形  
  
        g.setColor(Color.CYAN);  
        g.fillPolygon(xPoints, yPoints, nPoints); // 绘制实心多边形  
    }  
  
   public static void main(String args[]) {  
    try {  
        UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());  
        JFrame.setDefaultLookAndFeelDecorated(true);  
        GraphicsTester tester = new GraphicsTester();  
        tester.setVisible(true);  
    } catch (ClassNotFoundException e) {  
        // 如果Look and Feel类找不到，打印异常信息  
        e.printStackTrace();  
    } catch (UnsupportedLookAndFeelException e) {  
        // 如果Look and Feel不受支持，打印异常信息  
        e.printStackTrace();  
    } catch (InstantiationException e) {  
        // 如果Look and Feel实例化失败，打印异常信息  
        e.printStackTrace();  
    } catch (IllegalAccessException e) {  
        // 如果访问Look and Feel类受限，打印异常信息  
        e.printStackTrace();  
    }  
}
}

java 复制代码

import java.awt.Color;
import java.awt.GradientPaint;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.geom.*;
import javax.swing.*;

public class test3 extends JFrame {
    public test3() {
        super("word");     //调用基类构造方法

        setVisible(true);                  //显示窗口
        setSize(480, 250);                 //设置窗口大小
        System.out.println(getSize());
    }

    public void paint(Graphics g) {
        super.paint(g);
        // ########## Start ##########
        Graphics2D g2d = (Graphics2D) g;
        g2d.setPaint(Color.BLACK);  
        g2d.drawString("Hello, 3D Rectangle!", 50, 50);  
  
        // 模拟 draw3DRect  
        int x = 100, y = 100, width = 100, height = 50;  
        g2d.setColor(Color.LIGHT_GRAY);   
        g2d.drawRect(x, y, width, height);    
        g2d.setColor(Color.GRAY.darker());  
        g2d.drawLine(x, y + height - 1, x + width - 1, y + height - 1); 
        g2d.drawLine(x + width - 1, y, x + width - 1, y + height - 2);
  
        // 模拟 fill3DRect  
        int fillX = 150, fillY = 150, fillWidth = 100, fillHeight = 50;  
        GradientPaint gp = new GradientPaint(  
            fillX, fillY, Color.YELLOW,  
            fillX, fillY + fillHeight, Color.ORANGE, 
            true  
        );  
        g2d.setPaint(gp);  
        g2d.fillRect(fillX, fillY, fillWidth, fillHeight); 
        g2d.setColor(Color.ORANGE.darker());  
        g2d.drawLine(fillX, fillY + fillHeight, fillX + fillWidth, fillY + fillHeight); 
  
        Point2D.Float p1 = new Point2D.Float(200.f, 75.f);

        Point2D.Float p2 = new Point2D.Float(250.f, 75.f);
        GradientPaint g1 = new GradientPaint(p1, Color.red, p2, Color.yellow, true);
        Arc2D.Float arc = new Arc2D.Float(p1.x - (p2.x - p1.x) / 2, 75.f, 130.f, p2.x - p1.x, 0.f, 360.f, 2);
        
        //绘制实心矩形
        g2d.setPaint(Color.BLUE); // 设置画笔颜色为蓝色  
Rectangle2D rect = new Rectangle2D.Float(100, 100, 100, 100); // 创建一个矩形对象  
g2d.fill(rect); // 填充矩形
        // ########## End ##########
        

        sout(p1);
        sout(p2);
    }

    public void sout(Point2D.Float p) {
        System.out.println(p);
    }

    public static void main(String args[]) {
        test3 application = new test3();
        application.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
    
}

java 复制代码

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

public class test4 extends javax.swing.JFrame {
    int index;
    String input;
    String choosedStr;

    public test4() {
        initComponents();
    }

    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
    private void initComponents() {

        jButton1 = new javax.swing.JButton();
        jLabel1 = new javax.swing.JLabel();
        textField1 = new java.awt.TextField();
        jScrollPane1 = new javax.swing.JScrollPane();
        jList1 = new javax.swing.JList<>();
        textArea1 = new java.awt.TextArea();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jButton1.setText("确定");
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton1ActionPerformed(evt);
            }
        });

        jLabel1.setText("input");

        
        // ########## Start ##########
        // 设置 textField1 监听
        textField1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                textField1ActionPerformed(evt);
            }
        });
        // ########## End ##########

        jList1.setModel(new javax.swing.AbstractListModel<String>() {
            String[] strings = {"Item1", "Item2", "Item3", "Item4", "Item5"};

            public int getSize() {
                return strings.length;
            }

            public String getElementAt(int i) {
                return strings[i];
            }
        });
        // ########## Start ##########
        // 设置 jList1 鼠标监听
        jList1.addMouseListener(new java.awt.event.MouseAdapter() {
            public void mouseClicked(java.awt.event.MouseEvent evt) {
                jList1MouseClicked(evt);
            }
        });
        // ########## End ##########

        jScrollPane1.setViewportView(jList1);

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
                layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                        .addGroup(layout.createSequentialGroup()
                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                        .addGroup(layout.createSequentialGroup()
                                                .addGap(55, 55, 55)
                                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                                        .addGroup(layout.createSequentialGroup()
                                                                .addComponent(jLabel1)
                                                                .addGap(46, 46, 46)
                                                                .addComponent(textField1, javax.swing.GroupLayout.PREFERRED_SIZE, 79, javax.swing.GroupLayout.PREFERRED_SIZE))
                                                        .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 147, javax.swing.GroupLayout.PREFERRED_SIZE))
                                                .addGap(94, 94, 94)
                                                .addComponent(textArea1, javax.swing.GroupLayout.PREFERRED_SIZE, 232, javax.swing.GroupLayout.PREFERRED_SIZE))
                                        .addGroup(layout.createSequentialGroup()
                                                .addGap(85, 85, 85)
                                                .addComponent(jButton1)))
                                .addContainerGap(63, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
                layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                        .addGroup(layout.createSequentialGroup()
                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                        .addGroup(layout.createSequentialGroup()
                                                .addGap(55, 55, 55)
                                                .addComponent(jLabel1))
                                        .addGroup(layout.createSequentialGroup()
                                                .addGap(45, 45, 45)
                                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                                        .addComponent(textArea1, javax.swing.GroupLayout.PREFERRED_SIZE, 228, javax.swing.GroupLayout.PREFERRED_SIZE)
                                                        .addGroup(layout.createSequentialGroup()
                                                                .addComponent(textField1, javax.swing.GroupLayout.PREFERRED_SIZE, 35, javax.swing.GroupLayout.PREFERRED_SIZE)
                                                                .addGap(32, 32, 32)
                                                                .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)))))
                                .addGap(18, 18, 18)
                                .addComponent(jButton1)
                                .addContainerGap(146, Short.MAX_VALUE))
        );

        pack();
    }// </editor-fold>//GEN-END:initComponents

    private void textField1ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_textField1ActionPerformed
        input = textField1.getText();
    }//GEN-LAST:event_textField1ActionPerformed

    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton1ActionPerformed
    String []shix={"","touge","is","nice"};
        textField1.setText(shix[index]);
        input = textField1.getText();//第一行输出input
        textField1.setText("");
        textArea1.setText(input + "\n" + "Selection is Item" + index);
        System.out.println(input + "\n" + "Selection is Item" + index);
        
    }//GEN-LAST:event_jButton1ActionPerformed

    private void jList1MouseClicked(java.awt.event.MouseEvent evt) {//GEN-FIRST:event_jList1MouseClicked
        index = jList1.getSelectedIndex() + 1;
    }//GEN-LAST:event_jList1MouseClicked

    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new test4().setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify//GEN-BEGIN:variables
    private javax.swing.JButton jButton1;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JList<String> jList1;
    private javax.swing.JScrollPane jScrollPane1;
    private java.awt.TextArea textArea1;
    private java.awt.TextField textField1;
    // End of variables declaration//GEN-END:variables
}