sy4.java

平时自己上课时候做的JAV实验代码

        button16.setLabel("0");
        button16.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                button16ActionPerformed(evt);
            }
        });

        panel3.add(button16);

        button17.setLabel(".");
        button17.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                button17ActionPerformed(evt);
            }
        });

        panel3.add(button17);

        button18.setLabel("=");
        button18.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                button18ActionPerformed(evt);
            }
        });

        panel3.add(button18);

        button19.setLabel("/");
        button19.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                button19ActionPerformed(evt);
            }
        });

        panel3.add(button19);

        add(panel3);

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

    private void button21ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_button21ActionPerformed
// TODO 将在此处添加您的处理代码：
        Frame MyFrame=new Frame();
        FileDialog A=new FileDialog(MyFrame,"文件操作对话框");
        A.setVisible(true);
        String fname=A.getFile();
    }//GEN-LAST:event_button21ActionPerformed

    private void button1ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_button1ActionPerformed
// TODO 将在此处添加您的处理代码：
        String str=textField1.getText();
        int len=str.length();
        if(len==0)
            return;
        str=str.substring(0,len-1);
        textField1.setText(str);
    }//GEN-LAST:event_button1ActionPerformed

    private void button3ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_button3ActionPerformed
// TODO 将在此处添加您的处理代码：
        this.textField1.setText("  ");
    }//GEN-LAST:event_button3ActionPerformed

    private void cmdActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_cmdActionPerformed
// TODO 将在此处添加您的处理代码：
        String str=this.textField1.getText();
        FileWriter output;
        // output.write()
        
        try{
            output=new FileWriter("c:/temp.txt");
            output.write(str);
            output.close();
        }catch(IOException ex){
            ex.printStackTrace();}
    }//GEN-LAST:event_cmdActionPerformed

    private void cmddActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_cmddActionPerformed
// TODO 将在此处添加您的处理代码：
        
        
        try{
            FileInputStream rf=new FileInputStream("c:/temp.txt");
            
            byte  buffer[]=new byte[20];
            while((rf.read(buffer)!=-1)) {
                for(int i=0;i<buffer.length;i++)
                    System.out.println(new String(buffer));
            }
            System.out.println();
            rf.close();
        } catch(IOException ioe){
            System.out.println(ioe);
        } catch(Exception e) {
            System.out.println(e);
        }
    }//GEN-LAST:event_cmddActionPerformed

    private void button19ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_button19ActionPerformed
// TODO 将在此处添加您的处理代码：
        String str=this.textField1.getText();
        textField1.setText(str+"/");
    }//GEN-LAST:event_button19ActionPerformed

    private void button18ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_button18ActionPerformed
// TODO 将在此处添加您的处理代码：
        String str=this.textField1.getText();
        textField1.setText(str+"=");
    }//GEN-LAST:event_button18ActionPerformed

    private void button17ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_button17ActionPerformed
// TODO 将在此处添加您的处理代码：
        String str=this.textField1.getText();
        textField1.setText(str+".");
    }//GEN-LAST:event_button17ActionPerformed

    private void button16ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_button16ActionPerformed
// TODO 将在此处添加您的处理代码：
        String str=this.textField1.getText();
        textField1.setText(str+"0");
    }//GEN-LAST:event_button16ActionPerformed

    private void button15ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_button15ActionPerformed
// TODO 将在此处添加您的处理代码：
        String str=this.textField1.getText();
        textField1.setText(str+"*");
    }//GEN-LAST:event_button15ActionPerformed

    private void button14ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_button14ActionPerformed
// TODO 将在此处添加您的处理代码：
        String str=this.textField1.getText();
        textField1.setText(str+"3");
    }//GEN-LAST:event_button14ActionPerformed

    private void button13ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_button13ActionPerformed
// TODO 将在此处添加您的处理代码：
        String str=this.textField1.getText();
        textField1.setText(str+"2");
    }//GEN-LAST:event_button13ActionPerformed

    private void button12ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_button12ActionPerformed
// TODO 将在此处添加您的处理代码：
        String str=this.textField1.getText();
        textField1.setText(str+"1");
    }//GEN-LAST:event_button12ActionPerformed

    private void button11ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_button11ActionPerformed
// TODO 将在此处添加您的处理代码：
        String str=this.textField1.getText();
        textField1.setText(str+"-");
    }//GEN-LAST:event_button11ActionPerformed

    private void button10ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_button10ActionPerformed
// TODO 将在此处添加您的处理代码：
        String str=this.textField1.getText();
        textField1.setText(str+"6");
    }//GEN-LAST:event_button10ActionPerformed

    private void button9ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_button9ActionPerformed
// TODO 将在此处添加您的处理代码：
        String str=this.textField1.getText();
        textField1.setText(str+"5");
    }//GEN-LAST:event_button9ActionPerformed

    private void button8ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_button8ActionPerformed
// TODO 将在此处添加您的处理代码：
        String str=this.textField1.getText();
        textField1.setText(str+"4");
    }//GEN-LAST:event_button8ActionPerformed

    private void button7ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_button7ActionPerformed
// TODO 将在此处添加您的处理代码：
        String str=this.textField1.getText();
        textField1.setText(str+"+");
    }//GEN-LAST:event_button7ActionPerformed

    private void button6ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_button6ActionPerformed
// TODO 将在此处添加您的处理代码：
        String str=this.textField1.getText();
        textField1.setText(str+"9");
    }//GEN-LAST:event_button6ActionPerformed

    private void button5ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_button5ActionPerformed
// TODO 将在此处添加您的处理代码：
        String str=this.textField1.getText();
        textField1.setText(str+"8");
    }//GEN-LAST:event_button5ActionPerformed

    private void button4ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_button4ActionPerformed
// TODO 将在此处添加您的处理代码：
        String str=this.textField1.getText();
        textField1.setText(str+"7");
    }//GEN-LAST:event_button4ActionPerformed
    
    /** Exit the Application */
    private void exitForm(java.awt.event.WindowEvent evt) {//GEN-FIRST:event_exitForm
        System.exit(0);
    }//GEN-LAST:event_exitForm
    
    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new sy4().setVisible(true);
            }
        });
    }
    
    
    // 变量声明 - 不进行修改//GEN-BEGIN:variables
    private java.awt.Button button1;
    private java.awt.Button button10;
    private java.awt.Button button11;
    private java.awt.Button button12;
    private java.awt.Button button13;
    private java.awt.Button button14;
    private java.awt.Button button15;
    private java.awt.Button button16;
    private java.awt.Button button17;
    private java.awt.Button button18;
    private java.awt.Button button19;
    private java.awt.Button button2;
    private java.awt.Button button21;
    private java.awt.Button button3;
    private java.awt.Button button4;
    private java.awt.Button button5;
    private java.awt.Button button6;
    private java.awt.Button button7;
    private java.awt.Button button8;
    private java.awt.Button button9;
    private java.awt.Button cmd;
    private java.awt.Button cmdd;
    private java.awt.Panel panel1;
    private java.awt.Panel panel2;
    private java.awt.Panel panel3;
    private java.awt.TextField textField1;
    // 变量声明结束//GEN-END:variables
    
}