The difference between == and === in java

== and === in Java are comparison operators used to compare the value or value and type of a variable. == only compares values, while === compares both values ​​and types. Therefore: == is used to compare the values ​​of primitive type variables. === is used to strictly compare the values ​​and types of objects to ensure that they are the same object instance. Note: For object references, == compares the memory address, while === compares the actual value.

The difference between == and === in Java

Direct answer:
== and === in Java are comparison operators, but their usage and meaning are different. == compares the values ​​of two operands, while === compares both values ​​and types.

Detailed explanation:

== (value comparison)

• Compare the values ​​of two operands, regardless of their type.
• If the values ​​of the two operands are the same, return true, otherwise return false.

• For example:

  <code class="java">int a = 10;
  int b = 10.0;
  System.out.println(a == b); // true</code>

=== (value and type comparison)

• Compare simultaneously The values ​​and types of the two operands.
• Returns true only when the values ​​and types of the two operands are the same.

• For example:

  <code class="java">int a = 10;
  double b = 10.0;
  System.out.println(a === b); // false</code>

Usage scenario:

• == : Usually used to compare variable values ​​of basic types.
• ===: Used to strictly compare the value and type of objects to ensure that they are the same object instance.

Note:

• In Java, == and === are independent operators and have no abbreviation.
• For object references, == compares the memory address of the object, while === compares the actual value of the object.

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