The difference between java = and ==

Difference:

In Java, = is an assignment operation, while == is used to determine whether the values ​​are equal.

Example:

a=b  //就是把b的值赋予给a;
a==b  //就是判断a等于b

Judgment condition for judging whether the two values ​​compared by the == operator are equal:

1 , if two values ​​have the same type, then test for equality; if the two values ​​are exactly the same, they are equal; if they are not exactly the same, then they are not equal.

2. If two values ​​are of different types, they may still be equal. Use the following rules and type conversions to check their equality:

If one value is null and the other value is undefined, they are equal;

If one value is a number, the other value Is a string, convert the string into a number, and then use the converted value for comparison;

If a value is true, convert it to 1, and then compare. If a value is false, convert it to 0, and then compare;

If one value is an object and the other value is a number or string, convert the object into a primitive type value, and then compare;

Other combinations are not equal.

Recommended tutorial: java tutorial

The above is the detailed content of The difference between java = and ==. For more information, please follow other related articles on the PHP Chinese website!