How do you swap two variables in java with GUI?

Answer 1

/*Program to swap 2 values without using the temporary variable and Arithmetic operators*/

class Swap

{

public static void main(String args[])

{

int a=1;

int b=2;

System.out.println("Before swap: a="+a+"b="+b);

a=a^b;

b=a^b;

a=a^b;

System.out.println(" After swap: a="+a+"b="+b);

}

}

Another Method

class Swap

{

• public static void Swap()

• {

• int num1 = 10;

• int num2 = 20;

• System.out.println("Before Swapping");

• System.out.println("Value of num1 is :" + num1);

• System.out.println("Value of num2 is :" +num2);

• //add both the numbers and assign it to first

• num1 = num1 + num2;

• num2 = num1 - num2;

• num1 = num1 - num2;

• System.out.println("Before Swapping");

• System.out.println("Value of num1 is :" + num1);

• System.out.println("Value of num2 is :" +num2);

• }
• }

Answer 2

/* ------- first method -------- */

lets assume

a = 10;

b = 20;

a = a +b; // Now a will become - 30(10+20)

b = a - b // B will be 10 (30 - 20)

a = a - b // A will be 20 (30 - 10)

Both the variable is swapped

/*---------- Second method ----------*/

lets assume

a = 10;

b = 20;

a = a^b;

b = a^b;

a = a^b;

Now both the value has been changed ...

Answer 3

Consider the following declarations:

int x = 0;

int y = 1;

In order to swap the values, we need to use a temporary variable:

int t = x;

x = y;

y = t;

However, it is possible to swap the values without using a third variable:

x ^= y ^= x ^= y;

Answer 4

There are two ways how to accomplish this, using subtraction and addition operations or XOR operation. This example has in both ways of doing it.

a = 7

b = 5

a = a + b = 7 + 5 = 12

b = a - b = 12 - 5 = 7 (b)

a = a - b = 12 - 7 = 5 (a)

---

a = 0011 (binary number representation)

b = 0101

a = a xor b = 0110

b = a xor b = 0011 (b)

a = a xor b = 0101 (a)

Here is JAVA code doing exactly that:

import java.util.*;

public class Test

{

public static void main(String[] args)

{

// Without XOR opertion

int a = 7;

int b = 5;

a = a + b;

b = a - b;

a = a - b;

System.out.println("a = " + a + "; b = " + b);

// Output: a = 5; b = 7

// With XOR operation

int c = Integer.parseInt("0011", 2);

int d = Integer.parseInt("0101", 2);

c = c ^ d;

d = c ^ d;

c = c ^ d;

System.out.println("c = " + Integer.toBinaryString(c) + "; d = " + Integer.toBinaryString(d));

// Output: c = 101; d = 11

}

}

Answer 5

class swapprogram {

public static void main(String args[]) {

int a=10,b=11,t=0

/* Define the values to be swapped; a and b are the values to be

swapped, while t is the holding variable. */

System.out.println("The Values of A and B before the swap" + a + ", " +

b); /* Print out the variables' values before the swap. */

t=a; /* Move a into the holding variable */

a=b; /* Move b into a; the swapping occurs here */

b=t; /* Move the holding variable (a) into b */

System.out.println("The Values of A and B after the swap" + a + ", " + b);

/* Print out the variables' values after the swap */

}

}

By

Saravanan and APerson241

Answer 6

assume x, y, temp are all declared as the same type of variable and x and y have values:

temp = x; //store one of the values to a temporary

x = y; //the variable holding the value just stored can now be overwritten

y = temp; // place x's original value into y

Answer 7

This has nothing to do with the GUI. The swapping of variables will be done in code. You do this by copying one of the variable to a temprary variable. For example:

// Initial values

int a = 5;

int b = 7;

// Swap the values

int temp = a;

a = b;

b = temp;

Answer 8

Most languages don't have specific commands to swap two variables; in that case, you must temporarily store the information in a third variable, for example:

//Swap "a" and "b"

temp = a;

a = b;

b = temp;

This of course assumes that all variables have already been declared.