Java Collections replaceAll() Method

The replaceAll() method of Java Collections class is used to replace all occurrences of one specified value in a list with the other specified value.

Syntax

Following is the declaration of replaceAll() method:

Parameter

Returns

The replaceAll() method returns true if the list contained one or more elements e such that (oldVal==null ? e==null : oldVal.equals(e)).

Exceptions

UnsupportedOperationException- It throws this exception if the specified list or its list-iterator does not support the set operation.

Compatibility Version

Java 1.4 and above

Example 1

Output:

Initial values are :[Java, SSSIT, HINDI100, Java]
Value after replace :[TpointTech, SSSIT, HINDI100, TpointTech]

Example 2

Output:

Original List:- [one, two, one]
Boolean: true
Value after replace:- [three, two, three]

Example 3

Output:

Original List: [10, 20, 10, 40, 50, 10]
Boolean: true
Value after Replace: [400, 20, 400, 40, 50, 400]