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The following code seemed really confusing to me since it provided two different outputs.The code was tested on jdk 1.7. public class NotEq { public static void main(String[] args) { ver1(); System.out.println(); ver2(); } public static void ver1() { Integer a = 128; Integer b = 128; if (a == b) { System.out.println("Equal Object"); } if (a != b) { System.out.println("Different objects"); } if (a.equals(b)) { System.out.println("Meaningfully equal."); } } public static void ver2() { Integer i1 = 127; Integer i2 = 127; if (i1 == i2) { System.out.println("Equal Object"); } if (i1 != i2){ System.out.println("Different objects"); } if (i1.equals(i2)){ System.out.println("Meaningfully equal"); } } } Output: [ver1 output] Different objects Meaningfully equal. [ver2 output] Equal Object Meaningfully equal Why the == and != testing produces different results for ver1() and ver2() for same number much less than the Integer.MAX_VALUE? Can it be concluded that == checking for numbers greater than 127 (for wrapper classes like Integer as shown in the code) is totally waste of time?

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