Java Program to Swap Two Numbers

Author: java-w3schools

src/main/java/com/javaprogramto/numbers/swap/SwapNumbersTemp.java

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+package com.javaprogramto.numbers.swap;
+
+public class SwapNumbersTemp {
+
+	public static void main(String[] args) {
+
+		int a = 10;
+		int b = 20;
+
+		System.out.println("Before swapping two numbers : a " + a + ", b " + b);
+		int temp = a;
+		a = b;
+		b = temp;
+
+		System.out.println("After swapping two numbers : a " + a + ", b " + b);
+	}
+}

src/main/java/com/javaprogramto/numbers/swap/SwapNumbersWIthoutThirdVariable.java

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+package com.javaprogramto.numbers.swap;
+
+public class SwapNumbersWIthoutThirdVariable {
+
+	public static void main(String[] args) {
+
+		int firstNumber = 10;
+		int secondNumber = 20;
+		
+
+		System.out
+				.println("Before swapping two numbers : firstNumber " + firstNumber + ", secondNumber " + secondNumber);
+		
+
+		firstNumber = firstNumber + secondNumber;
+		secondNumber = firstNumber - secondNumber;
+		firstNumber = firstNumber - secondNumber;
+		
+
+		System.out
+				.println("After swapping two numbers : firstNumber " + firstNumber + ", secondNumber " + secondNumber);
+	}
+}