calculatorjframe.java

java实现的计算器

                            .addComponent(bclr, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                            .addComponent(b3, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, 52, Short.MAX_VALUE)
                            .addComponent(b6, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, 52, Short.MAX_VALUE)
                            .addComponent(b9, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, 52, Short.MAX_VALUE))
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                            .addComponent(mul, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, 54, Short.MAX_VALUE)
                            .addComponent(b16, javax.swing.GroupLayout.PREFERRED_SIZE, 54, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addComponent(div, javax.swing.GroupLayout.DEFAULT_SIZE, 54, Short.MAX_VALUE)
                            .addComponent(sub, javax.swing.GroupLayout.DEFAULT_SIZE, 54, Short.MAX_VALUE))))
                .addContainerGap())
            .addComponent(jSeparator1, javax.swing.GroupLayout.DEFAULT_SIZE, 272, Short.MAX_VALUE)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(b0, javax.swing.GroupLayout.PREFERRED_SIZE, 65, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(point, javax.swing.GroupLayout.PREFERRED_SIZE, 59, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(equalSign, javax.swing.GroupLayout.PREFERRED_SIZE, 52, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(add, javax.swing.GroupLayout.DEFAULT_SIZE, 54, Short.MAX_VALUE)
                .addContainerGap())
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(text1, javax.swing.GroupLayout.PREFERRED_SIZE, 42, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(14, 14, 14)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(bce, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(b16, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(bbksp, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(bclr, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(b7, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(b8, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(div, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(b9, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(b4, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(b5, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(mul, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(b6, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(b1, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(b2, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(sub, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(b3, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(point, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(equalSign, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(b0, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(add, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 14, Short.MAX_VALUE)
                .addComponent(jSeparator1, javax.swing.GroupLayout.PREFERRED_SIZE, 21, javax.swing.GroupLayout.PREFERRED_SIZE))
        );
        pack();
    }// </editor-fold>//GEN-END:initComponents

    private void b16MouseClicked(java.awt.event.MouseEvent evt) {//GEN-FIRST:event_b16MouseClicked
// TODO 将在此处添加您的处理代码：
        if (text1.getText().equals(new String("0")))
            return;
        text1.setText(new String("-(") + text1.getText() + new String(")"));
        if (mybool == false)
            a = a * (-1.0);
        else
            b = b * (-1.0);
    }//GEN-LAST:event_b16MouseClicked

    private void bbkspMouseClicked(java.awt.event.MouseEvent evt) {//GEN-FIRST:event_bbkspMouseClicked
// TODO 将在此处添加您的处理代码：
        String s = text1.getText();
        s = s.substring(0, s.length()-1);
        text1.setText(s);
        if (mybool == false)
            a = Double.parseDouble(text1.getText());
        else
            b = Double.parseDouble(text1.getText());
    }//GEN-LAST:event_bbkspMouseClicked

    private void bceMouseClicked(java.awt.event.MouseEvent evt) {//GEN-FIRST:event_bceMouseClicked
// TODO 将在此处添加您的处理代码：
        text1.setText(new String(""));
        if (mybool == false) {
            a = 0.0;
        }
        else {
            b = 0.0;
        }
    }//GEN-LAST:event_bceMouseClicked

    private void bclrMouseClicked(java.awt.event.MouseEvent evt) {//GEN-FIRST:event_bclrMouseClicked
// TODO 将在此处添加您的处理代码：
        text1.setText(new String(""));
        myClear();
    }//GEN-LAST:event_bclrMouseClicked

    private void pointMouseClicked(java.awt.event.MouseEvent evt) {//GEN-FIRST:event_pointMouseClicked
// TODO 将在此处添加您的处理代码：       
        text1.setText(text1.getText() + new String("."));
        
    }//GEN-LAST:event_pointMouseClicked

    private void equalSignMouseClicked(java.awt.event.MouseEvent evt) {//GEN-FIRST:event_equalSignMouseClicked
// TODO 将在此处添加您的处理代码：
        text1.setText(new String(""));
        if (mybool == true) {
            switch (what) {
                case '+':
                    result = a + b;
                    break;
                case '-':   
                    java.math.BigDecimal one = new java.math.BigDecimal(a);
                    java.math.BigDecimal two = new java.math.BigDecimal(b);
                    result = one.subtract(two).doubleValue();
                    break;
                case '*':
                    result = a * b;
                    break;
                case '/':
                    result = a / b;
                    break;
            }            
        }
        else {
            result = a;            
        }                 
        int i = (int)result;
        if (result - i == 0.0)
            text1.setText(new String("") + i);
        else {
            /*String s = new String("") + result;
            int p = s.indexOf('.');
            if ((s.length() > p + 9) && (s.indexOf('E') == -1) && (s.indexOf('e') == -1))
                s = s.substring(0, p + 9);
            text1.setText(s);*/
            text1.setText(new String("") + result);
        }
        myClear();  
        b = 0.0;
        mybool = false;
        what = '\u0000';
        a = result = Double.parseDouble(text1.getText());
    }//GEN-LAST:event_equalSignMouseClicked

    private void divMouseClicked(java.awt.event.MouseEvent evt) {//GEN-FIRST:event_divMouseClicked
// TODO 将在此处添加您的处理代码：
        text1.setText(new String(""));
        mybool = true;
        what = '/';
    }//GEN-LAST:event_divMouseClicked

    private void mulMouseClicked(java.awt.event.MouseEvent evt) {//GEN-FIRST:event_mulMouseClicked
// TODO 将在此处添加您的处理代码：
        text1.setText(new String(""));
        mybool = true;
        what = '*';
    }//GEN-LAST:event_mulMouseClicked

    private void subMouseClicked(java.awt.event.MouseEvent evt) {//GEN-FIRST:event_subMouseClicked
// TODO 将在此处添加您的处理代码：
        text1.setText(new String(""));
        mybool = true;
        what = '-';
    }//GEN-LAST:event_subMouseClicked

    private void addMouseClicked(java.awt.event.MouseEvent evt) {//GEN-FIRST:event_addMouseClicked
// TODO 将在此处添加您的处理代码：
        text1.setText(new String(""));
        mybool = true;
        what = '+';
    }//GEN-LAST:event_addMouseClicked

    private void b9MouseClicked(java.awt.event.MouseEvent evt) {//GEN-FIRST:event_b9MouseClicked
// TODO 将在此处添加您的处理代码：
        myFaction(new String("9"));
    }//GEN-LAST:event_b9MouseClicked

    private void b8MouseClicked(java.awt.event.MouseEvent evt) {//GEN-FIRST:event_b8MouseClicked
// TODO 将在此处添加您的处理代码：
        myFaction(new String("8"));
    }//GEN-LAST:event_b8MouseClicked

    private void b7MouseClicked(java.awt.event.MouseEvent evt) {//GEN-FIRST:event_b7MouseClicked
// TODO 将在此处添加您的处理代码：
        myFaction(new String("7"));
    }//GEN-LAST:event_b7MouseClicked

    private void b6MouseClicked(java.awt.event.MouseEvent evt) {//GEN-FIRST:event_b6MouseClicked
// TODO 将在此处添加您的处理代码：
        myFaction(new String("6"));
    }//GEN-LAST:event_b6MouseClicked

    private void b5MouseClicked(java.awt.event.MouseEvent evt) {//GEN-FIRST:event_b5MouseClicked
// TODO 将在此处添加您的处理代码：
        myFaction(new String("5"));
    }//GEN-LAST:event_b5MouseClicked

    private void b4MouseClicked(java.awt.event.MouseEvent evt) {//GEN-FIRST:event_b4MouseClicked
// TODO 将在此处添加您的处理代码：
        myFaction(new String("4"));
    }//GEN-LAST:event_b4MouseClicked

    private void b3MouseClicked(java.awt.event.MouseEvent evt) {//GEN-FIRST:event_b3MouseClicked
// TODO 将在此处添加您的处理代码：
        myFaction(new String("3"));
    }//GEN-LAST:event_b3MouseClicked

    private void b2MouseClicked(java.awt.event.MouseEvent evt) {//GEN-FIRST:event_b2MouseClicked
// TODO 将在此处添加您的处理代码：
        myFaction(new String("2"));
    }//GEN-LAST:event_b2MouseClicked

    private void b1MouseClicked(java.awt.event.MouseEvent evt) {//GEN-FIRST:event_b1MouseClicked
// TODO 将在此处添加您的处理代码：
        myFaction(new String("1"));
    }//GEN-LAST:event_b1MouseClicked

    private void b0MouseClicked(java.awt.event.MouseEvent evt) {//GEN-FIRST:event_b0MouseClicked
// TODO 将在此处添加您的处理代码：
        myFaction(new String("0"));
    }//GEN-LAST:event_b0MouseClicked
    
    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new CalculatorJFrame().setVisible(true);
            }
        });
    }
    
    private double a = 0.0; //第一个操作数据
    private double b = 0.0; //第二个操作数据
    private double result = 0.0; //运算结果存放处
    private boolean mybool = false; //若为false，说明此时正输入a；否则正输入b
    private char what = '\u0000'; //判断是什么样的运算：+, -, *, /
    // 变量声明 - 不进行修改//GEN-BEGIN:variables
    private javax.swing.JButton add;
    private javax.swing.JButton b0;
    private javax.swing.JButton b1;
    private javax.swing.JButton b16;
    private javax.swing.JButton b2;
    private javax.swing.JButton b3;
    private javax.swing.JButton b4;
    private javax.swing.JButton b5;
    private javax.swing.JButton b6;
    private javax.swing.JButton b7;
    private javax.swing.JButton b8;
    private javax.swing.JButton b9;
    private javax.swing.JButton bbksp;
    private javax.swing.JButton bce;
    private javax.swing.JButton bclr;
    private javax.swing.JButton div;
    private javax.swing.JButton equalSign;
    private javax.swing.JMenu jMenu1;
    private javax.swing.JMenuBar jMenuBar1;
    private javax.swing.JSeparator jSeparator1;
    private javax.swing.JButton mul;
    private javax.swing.JButton point;
    private javax.swing.JButton sub;
    private javax.swing.JTextField text1;
    // 变量声明结束//GEN-END:variables
    
}