Calculator.java, is a simple command line calculator.Note that the program terminates if any operand is nonnumeric. Write a program with an exception handler that deals with nonnumeric operands; then write another program without using an exception handler to achieve the same objective. Your program should display a message that informs the user of the wrong operand type before exiting. (See Figure 1) public class Calculator {/** Main method */public static void main(String[] args) {// Check number of strings passedif (args.length != 3) {System.out.println("Usage: java Calculator operandl operator operand2");System.exit(0);}// The result of the operationint result = 0;// Determine the operatorswitch (args[1].charAt(0)) {case '+': result = Integer.parseInt(args[0]) +Integer.parseInt(args[2]);break;case '-': result - Integer.parseInt(args[0]) -Integer.parseInt(args[2]);break;case '.': result - Integer.parseInt(args[0]) *Integer.parseInt(args[2]);break;case '/': result = Integer.parseInt(args[0]) /Integer.parseInt(args[2]);}// Display resultSystem.out.print1n(args[0] ++ result);+ args[1] ++ args[2]} Command PromptC: \exercise>java Exercise12_01 4 + 54 + 5 = 9e:\exercise>jaua Exercise12_01 4 - 54 - 5= -1C:\exorcise>java Exerciso12_01 4x - 5dr ong Input: 4xe:\exercise>.Figure 1

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Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Calculator.java, is a simple command line calculator.Note that the program terminates if any operand is nonnumeric. Write a program with an exception handler that deals with nonnumeric operands; then write another program without using an exception handler to achieve the same objective. Your program should display a message that informs the user of the wrong operand type before exiting. (See Figure 1)

public class Calculator {
/** Main method */
public static void main(String[] args) {
// Check number of strings passed
if (args.length != 3) {
System.out.println(
"Usage: java Calculator operandl operator operand2");
System.exit(0);
}
// The result of the operation
int result = 0;
// Determine the operator
switch (args[1].charAt(0)) {
case '+': result = Integer.parseInt(args[0]) +
Integer.parseInt(args[2]);
break;
case '-': result - Integer.parseInt(args[0]) -
Integer.parseInt(args[2]);
break;
case '.': result - Integer.parseInt(args[0]) *
Integer.parseInt(args[2]);
break;
case '/': result = Integer.parseInt(args[0]) /
Integer.parseInt(args[2]);
}
// Display result
System.out.print1n(args[0] +
+ result);
+ args[1] +
+ args[2]
}

Command Prompt
C: \exercise>java Exercise12_01 4 + 5
4 + 5 = 9
e:\exercise>jaua Exercise12_01 4 - 5
4 - 5= -1
C:\exorcise>java Exerciso12_01 4x - 5
dr ong Input: 4x
e:\exercise>.
Figure 1

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