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图形化用户界面-java头歌实训

news 来源：原创 2024/7/4 22:17:56

图形化用户界面

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();  }  
}
}

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);}}

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:initComponentsprivate 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:initComponentsprivate void textField1ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_textField1ActionPerformedinput = textField1.getText();}//GEN-LAST:event_textField1ActionPerformedprivate void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton1ActionPerformedString []shix={"","touge","is","nice"};textField1.setText(shix[index]);input = textField1.getText();//第一行输出inputtextField1.setText("");textArea1.setText(input + "\n" + "Selection is Item" + index);System.out.println(input + "\n" + "Selection is Item" + index);}//GEN-LAST:event_jButton1ActionPerformedprivate void jList1MouseClicked(java.awt.event.MouseEvent evt) {//GEN-FIRST:event_jList1MouseClickedindex = jList1.getSelectedIndex() + 1;}//GEN-LAST:event_jList1MouseClickedpublic 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:variablesprivate 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
}