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  • 消息框四则运算

    源代码

    import javax.swing.JOptionPane;  // import class JOptionPane

     

    public class Addition1 {

     

        public static void main(String[] args)

        {

            //

            String firstNumber,fuhao,  secondNumber;     

            int number1,          // first number to add

            number2,            // second number to add

           fuhao1;              //fuhao1 to add;

            double  sum, subtract,multiply,chu;

      // read in first number from user as a string

      firstNumber =JOptionPane.showInputDialog( "Enter first integer" );

      // read in second number from user as a string

      secondNumber =JOptionPane.showInputDialog( "Enter second integer" );

      // read in operational character from user as a string

      fuhao=JOptionPane.showInputDialog("Enter yusuanfu:(1+ 2- 3* 4/)");

      number1 = Integer.parseInt( firstNumber );

      number2 = Integer.parseInt( secondNumber );

      fuhao1=Integer.parseInt( fuhao );

      sum = (double)number1 + number2;

      subtract=(double)number1 - number2;

      multiply=(double)number1*number2;

      chu=(double)number1/number2;

      switch(fuhao1)

         {

         case 1:  JOptionPane.showMessageDialog(null, "两数相加等于 " + sum, "Results",JOptionPane.PLAIN_MESSAGE );break;

         case 2:  JOptionPane.showMessageDialog(null,"两数相减等于"+subtract,"Result",JOptionPane.PLAIN_MESSAGE);break;

         case 3:  JOptionPane.showMessageDialog(null,"两数相乘等于"+multiply,"Result",JOptionPane.PLAIN_MESSAGE);break;

         case 4:   JOptionPane.showMessageDialog(null,"两数相除等于"+chu,"Result",JOptionPane.PLAIN_MESSAGE);break;

         default: System.exit( 0 ); 

     

         }

              System.exit( 0 );   // terminate the program

        }

     

    }

    结果截图

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  • 原文地址:https://www.cnblogs.com/wxd136/p/7634348.html
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