Java String contains Method

The Java contains method is one of the Java String Method which is used to check whether the string contains the user specified character sequence (sequence of characters) or not, and based on the result it will return Boolean True or False.

In this article we will show you, How to write string contains Method in Java Programming language with example. Before we get into the example, let us see the basic syntax of the string.contains in Java Programming language is as shown below.

Java String contains syntax

The following function accepts the Character Sequence as the argument and check whether the string contains the user given sequence of characters or not

public boolean contains(CharSequence seq); // It will return boolean True or False 

//In order to use in program
String_Object.contains(CharSequence seq)

Java String contains Method Example

The Java string contains method is used to check whether the string contains the given characters (in sequence) or not. In this Java program, We are going to find the same.

JAVA CODE

// Java String.contains example
package StringFunctions;

public class ContainsMethod {
	public static void main(String[] args) {
		String str = "Tutorials On Java Programming";
		String str1 = "We are abc working at abc company";
		
		boolean a = str.contains("ori");
		boolean b = str.contains("On Java");
		boolean c = str1.contains("working");
		boolean d = str1.contains("abc");
		boolean e = str1.contains("xyz");
	
		System.out.println("Does the String str contains ori? = " + a);
		System.out.println("Does the String str contains On Java? = " + b);
		System.out.println("Does the String str1 contains working? = " + c);
		System.out.println("Does the String str1 contains abc? = " + d);
		System.out.println("Does the String str1 contains xyz? = " + e);
	}
}

OUTPUT

ANALYSIS

First we declared two String variables Str, Str1 and assigned corresponding values using following statement

String str = "Tutorials On Java Programming";
String str1 = "We are abc working at abc company";

Following statement calls public boolean contains (CharSequence seq) method to check whether the string str contains the character sequence “ori” or not. If it is TRUE, it will return TRUE otherwise False

boolean a = str.contains("ori");

Following statement will check whether the string str contains the character sequence On Java or not. If it is TRUE, it will return TRUE otherwise False

boolean b = str.contains("On Java");

Let us try the wrong value. Following statement will call the public boolean contains (CharSequence seq) method to check whether the string str1 contains the character sequence xyz or not. We all know that, it is False

boolean e = str1.contains("xyz");

Following System.out.println statements will print the output

System.out.println("Does the String str contains ori? = " + a);
System.out.println("Does the String str contains On Java? = " + b);
System.out.println("Does the String str1 contains working? = " + c);
System.out.println("Does the String str1 contains abc? = " + d);
System.out.println("Does the String str1 contains xyz? = " + e);

Java String.contains Example

In this Java program, We are going to ask the user to enter any word and based the string value entered by the user, we will display the message.

JAVA CODE

package StringFunctions;

import java.util.Scanner;

public class ContainsMethodex {
	private static Scanner sc;
	public static void main(String[] args) {
		sc = new Scanner(System.in);
		
		System.out.println("Please Enter any word: ");
		String str = sc.nextLine();
		
		if (str.contains("gate")) {
			System.out.println("Hey!! Welcome to Tutorial Gateway");
		}
		else {
			System.out.println("Please type any word related to gate");
		}
	}
}

OUTPUT

Let us enter different word

ANALYSIS

Following statement will ask the user to enter any word, and then we are going to assign the user entered value to string variable str.

System.out.println("Please Enter any word: ");
String str = sc.nextLine();

Next, we used the Java If Else Statement to check where the user entered string is contains the character sequence “gate” or not.

• If the condition is True, the System.out.println(“Hey!! Welcome to Tutorial Gateway”); statement will be printed
• Else System.out.println(“Please type any word related to gate”); statement will be printed

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