In this tutorial, we will learn to create a Duplicate Words in String Program in Java using java programming.

Prerequisites

Before starting with this tutorial, we assume that you are best aware of the following Java programming concepts:

• Java Operators.
• Basic Input and Output function in Java.
• Class and Object in Java.
• Basic Java programming.
• If-else statements in Java.
• For loop in Java.

Duplicate Words in a String

Here we need to find out the duplicate words present in a string and display those words.

Example string = ” Hi, welcome to W3adda hi”

Output: “Hi”

Duplicate Words in String Program in Java

Output

Duplicate Word

In the above program, we have first declared and initialized a set of variables required in the program.

• str= it will hold the string
• length=  it will hold the length of a string
• i = for iteration
• wd = it will hold the duplicate words

After declaring variables we initiate values in str .

after initiating string in the variable str first of all we convert into lower case.

then we split a string into words by using the split() method.

then we count the length of a string

and within the loop we find duplicate word present in a string as shown mage below

And finally, we will print the duplicate values within the string.