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import java.io.*;
import java.util.*;
public class Calculator
{
public static void main(String args[])
{
System.out.println("Make your arithmetic selection from the choices below:\n");
System.out.println(" 1. Addition");
System.out.println(" 2. Subtraction");
System.out.println(" 3. Multiplication");
System.out.println(" 4. Division\n");
System.out.print(" Your choice? ");
Scanner kbReader = new Scanner(System.in);
int choice = kbReader.nextInt();
if((choice<=4) && (choice>0))
{
System.out.print("\nEnter first operand. ");
double op1 = kbReader.nextDouble();
System.out.print("\nEnter second operand.");
double op2 = kbReader.nextDouble();
System.out.println("");
switch (choice)
{
case 1: //addition
System.out.println(op1 + " plus " + op2 + " = " + (op1 + op2) );
break;
case 2: //subtraction
System.out.println(op1 + " minus " + op2 + " = " + (op1 - op2) );
break;
case 3: //multiplication
System.out.println(op1 + " times " + op2 + " = " + (op1 * op2) );
break;
case 4: //division
System.out.println(op1 + " divided by " + op2 + " = " + (op1 / op2) );
}
}
else
{
System.out.println("Please enter a 1, 2, 3, or 4.");
}
}
}
Read more: How_do_you_make_calculator_program_in_java
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Many people make Java programs, but if you mean who invented the Java programming language it was James Gosling of Sun Microsystems.
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See the related links section for a link to a JAR file containing this program.
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A Java Thread is a thread of execution in a Java Program. A Java Virtual Machine can have a single application running multiple threads, which is known as concurrency. Threads are what make the program run. Each thread has a different priority, and when the machine queue fills up, the threads are executed in the order of their priority.
