Java String contains example

String’s contains method checks if sequence of characters can be found in String. It returns true if character sequence is present in String else return false.

Method Signature:

public boolean contains(CharSequence s)

String contains Example:

package org.arpit.java2blog;

public class StringContainsMethodExample {

public static void main(String[] args) {

String str = "Hello world from java2blog.com";

if (str.contains("world")) {

System.out.println("String contains with world");

}

else {

System.out.println("String does not contain world");

}

if (str.contains("WORLD")) {

System.out.println("String contains WORLD");

}

else {

System.out.println("String does not contain WORLD");

}

When you run above program, you will get below output:

String contains with world

String does not contain WORLD

Please note that contains method is case sensitive as you can see in above example

Author

String

13 July

Remove substring from String in Java

Table of ContentsUsing String’s replace method to remove substring from String in JavaUsing String’s replaceFirst method to remove substring from String in JavaUsing String’s replaceAll method to remove substring from String in JavaUsing StringBuilder’s delete() method to remove substring from String in JavaUsing StringBuilder’s replace() method to remove substring from String in JavaConclusion In this […]

String

23 June

Java String contains Ignore Case

Table of ContentsUsing String.toLowerCase()Using Pattern.compile()Using String’s MatchesUsing StringUtils.containsIgnoreCase()Complete program for Java String contains IgnoreCaseConclusion We often have to check if a string contains a substring or not in a case-insensitive manner. There are multiple ways to do so. In this article, we will take a look at these methods for java String contains Ignore Case […]

String

02 June

Find and count occurrences of substring in string in java

Table of ContentsUsing the indexOf() methodUsing regular expressionUsing split() methodUsing the countMatches() method from Apache Commons library In this post, we will see how to find and count occurrences of substring in string in java. Using the indexOf() method The indexOf() method in java is a specialized function to find the index of the first […]

String

23 May

Print double quotes in java

Table of ContentsPrint double quotes in java using backslash characterPrint double quotes in java using unicode characterPrint double quotes in java by appending double quote character 💡 Outline You can print double quotes in java by escape double quotes using backslash character(\). [crayon-6146881623908871677364/] When you print on console using System.out.println, you use double quotes and […]