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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
Parameter | Description | Required/Optional |
---|---|---|
list | It is the list in which replacement is to be occur. | Required |
oldVal | It is the old value which will be replaced. | Required |
newVal | It is the new value with which oldVal is to be replaced. | Required |
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 :[tutoraspire, SSSIT, HINDI100, tutoraspire]
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]
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