spacing in java

I have a completed java program that takes an expression and solves it. The program works fine expept i need to print the final answer like this:2+2=4 and it doesnt. It puts the answer on a different line. Does anyone know what i did wrong?
Here is the program:

import java.util.*;
import java.io.*;

public class Calc1
{

//prompts the user for input and calls necessary methods
public static void main(String args[])
{
String cont = "";

do
{
System.out.println("Please enter a numeric expression.");
StringTokenizer exp = new StringTokenizer(Calc1.getInput(), "+-*/%", true);

//int result = Calc1.performOperation(exp);
System.out.println("" + Calc1.getInput() + "=" + Calc1.performOperation(exp));
System.out.print("Do you want to enter another expression? (y/n): ");
cont = Calc1.getInput();
}while(cont.equalsIgnoreCase("y"));

System.out.println("Goodbye");
}

//gets a single input from the user, and returns it as a String
static String getInput()
{
java.io.InputStreamReader input = new java.io.InputStreamReader(System.in);
java.io.BufferedReader console = new java.io.BufferedReader(input);

try
{
return console.readLine();
}
catch(java.io.IOException e)
{
System.err.println("Bad NEWS!!!");
return "";
}
}

//performs requested operation
static int performOperation (StringTokenizer exp)
{
int num1 = 0;
int result = 0;
String check = "";
String sve = "+";

do
{
check = exp.nextToken();
if(!check.equals("+") && !check.equals("-") && !check.equals("*") && !check.equals("/") && !check.equals("%"))
{
num1 = Integer.parseInt(check);

if(sve.equals("+"))
{
result = result + num1;
num1 = 0;
}

else if(sve.equals("-"))
{
result = result - num1;
}

else if(sve.equals("*"))
{
result = result * num1;
}

else if(sve.equals("/"))
{
result = result / num1;
}

else if(sve.equals("%"))
{
result = result % num1;
}
}

else
{
sve = check;
}
}while(exp.hasMoreTokens());

return result;
}
}

That's happening because you call Calc1.getInput several times, when you should only call it once. I changed it so that it gets the input in a string (s) and then s is used throughout the rest of the code where you were using getInput().

Hope this helps,
Kevin


import java.util.*;
import java.io.*;

public class Calc1
{

//prompts the user for input and calls necessary methods
public static void main(String args[])
{
String cont = "";

do
{
System.out.println("Please enter a numeric expression.");

String s = Calc1.getInput();

StringTokenizer exp = new StringTokenizer(s, "+-*/%", true);

//int result = Calc1.performOperation(exp);

System.out.println("" + s + "=" + Calc1.performOperation(exp));
System.out.print("Do you want to enter another expression? (y/n): ");

cont = Calc1.getInput();

}while(cont.equalsIgnoreCase("y"));

System.out.println("Goodbye");
}

//gets a single input from the user, and returns it as a String
static String getInput()
{
java.io.InputStreamReader input = new java.io.InputStreamReader(System.in);
java.io.BufferedReader console = new java.io.BufferedReader(input);

try
{
return console.readLine();
}
catch(java.io.IOException e)
{
System.err.println("Bad NEWS!!!");
return "";
}
}

//performs requested operation
static int performOperation (StringTokenizer exp)
{
int num1 = 0;
int result = 0;
String check = "";
String sve = "+";

do
{
check = exp.nextToken();
if(!check.equals("+") && !check.equals("-") && !check.equals("*") && !check.equals("/") && !check.equals("%"))
{
num1 = Integer.parseInt(check);

if(sve.equals("+"))
{
result = result + num1;
num1 = 0;
}

else if(sve.equals("-"))
{
result = result - num1;
}

else if(sve.equals("*"))
{
result = result * num1;
}

else if(sve.equals("/"))
{
result = result / num1;
}

else if(sve.equals("%"))
{
result = result % num1;
}
}

else
{
sve = check;
}
}while(exp.hasMoreTokens());

return result;
}
}