GUI_修改窗体的图标代码

﹏ヽ暗。殇╰゛Y 2022-06-18 12:29 239阅读 0赞

/*
     * To change this license header, choose License Headers in Project Properties.
     * To change this template file, choose Tools | Templates
     * and open the template in the editor.
     */
    package cn.itcast.util;
    
    import java.awt.Image;
    import java.awt.Toolkit;
    import javax.swing.JFrame;
    
    /**
     * 专门做界面效果的类
     *
     * @author 风清杨
     */
    public class UiUtil {
    
        private UiUtil() {
    
        }
    
        //修改窗体的图标
        public static void setFrameImage(JFrame jf) {
            //获取工具类对象
            //public static Toolkit getDefaultToolkit():获取默认工具包。
            Toolkit tk = Toolkit.getDefaultToolkit();
    
            //根据路径获取图片
            Image i = tk.getImage("src\\cn\\itcast\\result\\jjcc.jpg");
    
            //给窗体设置图片
            jf.setIconImage(i);
        }
    }

/*
     * To change this license header, choose License Headers in Project Properties.
     * To change this template file, choose Tools | Templates
     * and open the template in the editor.
     */
    package cn.itcast.view;
    
    import cn.itcast.util.UiUtil;
    
    /**
     *
     * @author 风清杨
     */
    public class NewJFrame extends javax.swing.JFrame {
    
        /**
         * Creates new form NewJFrame
         */
        public NewJFrame() {
            initComponents();
            init();
            UiUtil.setFrameImage(this);
        }
    
        public void init() {
            this.setTitle("四则运算符");
        }
    
        /**
         * This method is called from within the constructor to initialize the form.
         * WARNING: Do NOT modify this code. The content of this method is always
         * regenerated by the Form Editor.
         */
        @SuppressWarnings("unchecked")
        // <editor-fold defaultstate="collapsed" desc="Generated Code">                          
        private void initComponents() {
    
            jLabel1 = new javax.swing.JLabel();
            jLabel2 = new javax.swing.JLabel();
            jLabel3 = new javax.swing.JLabel();
            firstNumber = new javax.swing.JTextField();
            secondNumber = new javax.swing.JTextField();
            resultNumber = new javax.swing.JTextField();
            selectOperator = new javax.swing.JComboBox();
            jButton1 = new javax.swing.JButton();
            jLabel4 = new javax.swing.JLabel();
    
            setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
    
            jLabel1.setText("第一个操作数");
    
            jLabel2.setText("结果");
    
            jLabel3.setText("第一个操作数");
    
            selectOperator.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "+", "-", "*", "/" }));
    
            jButton1.setText("确定");
            jButton1.addActionListener(new java.awt.event.ActionListener() {
                public void actionPerformed(java.awt.event.ActionEvent evt) {
                    jButton1ActionPerformed(evt);
                }
            });
    
            jLabel4.setText("=");
    
            javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
            getContentPane().setLayout(layout);
            layout.setHorizontalGroup(
                layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addGroup(layout.createSequentialGroup()
                    .addGap(19, 19, 19)
                    .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                        .addComponent(jLabel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                        .addComponent(firstNumber))
                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                    .addComponent(selectOperator, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                    .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                        .addComponent(jLabel3, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                        .addComponent(secondNumber))
                    .addGap(13, 13, 13)
                    .addComponent(jLabel4)
                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                    .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                        .addComponent(jButton1)
                        .addComponent(jLabel2)
                        .addComponent(resultNumber, javax.swing.GroupLayout.PREFERRED_SIZE, 78, javax.swing.GroupLayout.PREFERRED_SIZE))
                    .addContainerGap(43, Short.MAX_VALUE))
            );
            layout.setVerticalGroup(
                layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addGroup(layout.createSequentialGroup()
                    .addContainerGap()
                    .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                        .addComponent(jLabel1)
                        .addComponent(jLabel2)
                        .addComponent(jLabel3))
                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                    .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                        .addComponent(firstNumber, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addComponent(secondNumber, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addComponent(resultNumber, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addComponent(selectOperator, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addComponent(jLabel4))
                    .addGap(33, 33, 33)
                    .addComponent(jButton1)
                    .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
            );
    
            pack();
        }// </editor-fold>                        
    
        private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                         
            //获取第一个操作数
            String firstNumberString = this.firstNumber.getText().trim();
            //获取运算符
            String selectOperator = this.selectOperator.getSelectedItem().toString();
            //获取第二个操作数
            String secondNumberString = this.secondNumber.getText().trim();
    
            //把字符串转换成整数
            int firstNumber = Integer.parseInt(firstNumberString);
            int secondNumber = Integer.parseInt(secondNumberString);
    
            //定义变量接收结果
            int resultNumber = 0;
    
            switch (selectOperator) {
                case "+":
                    resultNumber = firstNumber + secondNumber;
                    break;
                case "-":
                    resultNumber = firstNumber - secondNumber;
                    break;
                case "*":
                    resultNumber = firstNumber * secondNumber;
                    break;
                case "/":
                    resultNumber = firstNumber / secondNumber;
                    break;
            }
    
            //把结果赋值给结果框
            this.resultNumber.setText(String.valueOf(resultNumber));
        }                                        
    
        /**
         * @param args the command line arguments
         */
        public static void main(String args[]) {
            /* Set the Nimbus look and feel */
            //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
            /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
             * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
             */
            try {
                for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                    if ("Nimbus".equals(info.getName())) {
                        javax.swing.UIManager.setLookAndFeel(info.getClassName());
                        break;
                    }
                }
            } catch (ClassNotFoundException ex) {
                java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
            } catch (InstantiationException ex) {
                java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
            } catch (IllegalAccessException ex) {
                java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
            } catch (javax.swing.UnsupportedLookAndFeelException ex) {
                java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
            }
            //</editor-fold>
    
            /* Create and display the form */
            java.awt.EventQueue.invokeLater(new Runnable() {
                public void run() {
                    new NewJFrame().setVisible(true);
                }
            });
        }
    
        // Variables declaration - do not modify                     
        private javax.swing.JTextField firstNumber;
        private javax.swing.JButton jButton1;
        private javax.swing.JLabel jLabel1;
        private javax.swing.JLabel jLabel2;
        private javax.swing.JLabel jLabel3;
        private javax.swing.JLabel jLabel4;
        private javax.swing.JTextField resultNumber;
        private javax.swing.JTextField secondNumber;
        private javax.swing.JComboBox selectOperator;
        // End of variables declaration                   
    }