Core Java What Will Be Output

Java Version Used: JDK 1.7

Program 1:

public static void main(String[] args){

String s1 = "abc";

String s2 = "abc";

System.out.println("s1 == s2 is:" + s1 == s2);

}

Output:

false

Explanation:

Though here s1 object is equal to s2, the output will be false as here it's comparing the below strings for equality.

• s1 == s2 is:abc
• abc

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Program 2:

public static void main(String[] args){

String s1 = "abc";

String s2 = "abc";

System.out.println(s1 == s2);

}

Output:

True

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Program 3:

public static void main(String[] args){

String s1 = "abc";

String s2 = "abc";

System.out.println("s1 == s2 is:" + (s1 == s2));

}

Output:

s1 == s2 is:true

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Program 4:

public static void main(String[] args){

String s1 = "abc";

String s2 = "abc";

System.out.println("s1.equals(s2) is:" + s1.equals(s2));

}

Output:

s1.equals(s2) is:true

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Program 5:

public static void main(String[] args){

String s1 = "abc";

String s2 = new String("abc");

System.out.println(s1 == s2);

}

Output:

false

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