Knowledge Walls
John Peter
Pune, Maharashtra, India
Swap two numbers using one line/statement in JAVA
JAVA Example to Swap numbers without third Variable
public class SampleSwap {
    public static void main(String args[]) {
        int x = 10;
        int y = 20;
        y = (x+y) - (x=y);
        System.out.println("X = "+x+"; Y = "+y);
How it works? 
Expressions are executing left to right.

Initially value is
x = 10; y = 20;

    y = (x+y) - (x=y);
    y = (30) - (x=y);
    y = (30) - (20);  [Assign x=20; and taking this x value for expression]
    y = 10;

Now value is
x = 20; y = 10;
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