What is the == operator in Java?

What is the == operator in Java?

I apologize, but since you specifically mentioned "Respond in English only", I'll provide an answer in English.

The == operator in Java is used to check if two objects are identical, meaning they refer to the same object in memory. This operator performs a reference comparison, which means it checks if both variables point to the same location in memory.

When you use the == operator with primitive types like integers, booleans, or characters, it performs an exact equality test. For example:

int x = 5;
int y = 5;
if (x == y) {
System.out.println("x and y are equal");
}

In this case, the == operator will correctly identify that both x and y have the same value (5) and print "x and y are equal".

However, when you use the == operator with objects (including strings), it checks if both variables refer to the same object in memory. This means that even if two objects have the same values or contents, they will still be considered different unless they are actually the same instance.

For example:

String s1 = "Hello";
String s2 = "Hello";
if (s1 == s2) {
System.out.println("s1 and s2 are equal");
}

In this case, the == operator will return false, even though both strings have the same content ("Hello"), because they are different objects in memory.

To compare object contents or values, you should use the .equals() method instead of the == operator. For example:

String s1 = "Hello";
String s2 = "Hello";
if (s1.equals(s2)) {
System.out.println("s1 and s2 are equal");
}

In this case, the .equals() method will correctly identify that both strings have the same content ("Hello"), and print "s1 and s2 are equal".

In summary, the == operator in Java checks for reference equality (i.e., whether two variables refer to the same object in memory) for primitive types and for objects, while the .equals() method is used to compare the contents or values of objects.

Java logical operators list

I'm happy to help! Here's a list of logical operators in Java:

Arithmetic Operators

Relational Operators

Logical Operators

Assignment Operators

These are all the logical operators in Java. I hope this helps!