\nwhat does it mean in java

== operator compares whether the values ​​of two operands are equal. Basic data types compare values, and objects compare references. Non-basic types can override the equals() method or use == to compare references.

== Operator in Java

==== Operator

In Java, == is an equality operator that compares the values ​​of two operands for equality.

Syntax

boolean == (value1, value2);

Return result

If the values ​​of value1 and value2 are equal, return true; otherwise, return false .

Usage scenarios

== operator is usually used to compare the value equality of basic data types (such as int, double, char). For objects, the == operator compares their references, not their values.

Non-basic types

For non-basic types (such as objects), you can compare their actual values ​​using the following method:

• Override equals() method: Override the equals() method to customize the equality comparison of objects.
• Compare their references using the == operator.

Example

// 基本数据类型比较
int a = 5;
int b = 5;
System.out.println(a == b); // 输出：true

// 对象引用比较
String str1 = new String("hello");
String str2 = new String("hello");
System.out.println(str1 == str2); // 输出：false

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