Java Vector replaceAll() Method

The replaceAll() method of Java Vector class is used to replace each element of the list with the result of applying the operator to that element.

Syntax

Following is the declaration of replaceAll() method:

Parameter

Parameter	Description	Required/Optional
operator	It is an operator which will apply to each element.	Required

Return

The replaceAll() method does not return anything.

Exceptions

NullPointerException- This method has thrown an exception if the specified operator is null or if the operator result is a null value and this list does not permit null elements.

Compatibility Version

Java 1.2 and above

Example 1

import java.util.*;
public class VectorReplaceAllExample1 {  
	public static void main(String arg[]) {
		//Create an empty vector
            Vector<Integer> vec = new Vector<>();
            //Add elements in the Vector
            vec.add(10);
            vec.add(2);
            vec.add(30);
            vec.add(40);
            vec.add(2); 
            //Display vector elements
		System.out.println("Vector elements: " +vec);
		//replace all vector element "2" with "20"
		Collections.replaceAll(vec, 2, 20);
		//Display vector elements after replacement
		System.out.println("New vector elements: " + vec);
	      }
}

Test it Now

Output:

Vector elements: [10, 2, 30, 40, 2]
New vector elements: [10, 20, 30, 40, 20]

Example 2

import java.util.*;
public class VectorReplaceAllExample2 {  
	public static void main(String arg[]) {
            //Create an empty vector
		Vector<String> vec = new Vector<String>();
            //Add elements in the Vector
		vec.add("Java");
		vec.add("Python");
		vec.add("Android");
		vec.add("Java");
		vec.add("Ruby");
            //Display vector elements
		System.out.println("Vector elements: " +vec);
            //replace all vector element "Java" with "JavaTpoint"
		Collections.replaceAll(vec, "Java", "JavaTpoint");
            //Display vector elements after replacement
		System.out.println("New vector elements: " + vec);
	      }
}

Test it Now

Output:

Vector elements: [Java, Python, Android, Java, Ruby]
New vector elements: [JavaTpoint, Python, Android, JavaTpoint, Ruby]

Next TopicJava Vector

← prev next →

Latest Courses

We provides tutorials and interview questions of all technology like java tutorial, android, java frameworks

Contact info

G-13, 2nd Floor, Sec-3, Noida, UP, 201301, India

[email protected].

Python

AI, ML and Data Science

Java

B.Tech and MCA

Web Technology

Software Testing

Technical Interview

Java Interview

Web Interview

Database Interview

Company Interviews

Java Tutorial

Control Statements

Java Object Class

Java Inheritance

Java Polymorphism

Java Abstraction

Java Encapsulation

Java Array

Java OOPs Misc

Java String

Java String Methods

Java Regex

Exception Handling

Java Inner Class

Java Multithreading

Java Synchronization

Java Networking

Java Applet

Java Reflection

Java Conversion

Java JDBC

RMI

Internationalization

Java Array Class

Java AtomicInteger Class

Java AtomicLong Methods

Java Authenticator

Java BigDecimal class

Big Integer Class

Java Boolean class

Java Byte Class

Java Class

Java Collections class

Java Compiler Class

CopyOnWriteArrayList

Java Math Methods

LinkedBlockingDeque

Java Long class

LinkedTransferQueue

Java List

Java MulticastSocket

Java Number Class

Java Phaser Class

ArrayList Methods

Java Thread Methods

Java Projects

Java Programs

Java Misc

Java Date Class

Java ListIterator Class

Java NIO Tutorial

HttpURLConnection

Java Deque

Java HttpCookie Class

Java URL class

Java List Methods

Java Vector class

Java Collection Methods

Java Socket Class

Java Executors