Java String matches Method

The Java String.matches method is one of the Java String Method which is used to tell whether this string matches the user specified regular expression or not, and based on the result it will return Boolean True or False. In this article we will show you, How to write Java String matches Method with example. Before we get into the example, let us see the basic syntax of the string.matches in Java Programming language is as shown below.

Java String matches Method syntax

Following method will accept the Regular expression as the argument and check whether the original string matches with this expression or not

public boolean matches(String regexp); // It will return boolean True or False 

//In order to use in program
String_Object.matches(String regexp);

Java String matches Example

The Java String.matches method is used to check whether this string is exactly matching with the user specified expression or not. In this Java program, We are going to find the same.

JAVA CODE

// Java String.matches example
package StringFunctions;

public class MatchMethod {
	public static void main(String[] args) {
		String str = "Learn Java at Tutorial Gateway";
		String str1 = "We are abc working at abc Company";
		String str2 = "We are abc working at abc Company";
		
		boolean bool1 = str1.matches("abc");
		boolean bool2 = str1.matches(str2);		
		boolean bool3 = str.matches("Learn Java(.*)");
		boolean bool4 = str.matches("(.*)Java(.*)");

		System.out.println("Does String str1 Matches with 'abc'? = " + bool1);
		System.out.println("Does String str1 Matches with str2? = " + bool2);
		System.out.println("Does String str1 Matches with RegExp? = " + bool3);
		System.out.println("Does String str1 Matches with RegExp? = " + bool4);
	}
}

OUTPUT

ANALYSIS

First we declared three String variables str, str1, str2 and assigned corresponding data using following statement

String str = "Learn Java at Tutorial Gateway";
String str1 = "We are abc working at abc Company";
String str2 = "We are abc working at abc Company"

Following statement will call the public boolean matches (String regexp) method to check whether the string str1 matches with “abc” or not. From the above screenshot you can observe that, it is returning False because they are not matching.

boolean bool1 = str1.matches("abc");

Following statement will check whether the string str matches with “Learn Java (.*)” or not. It means, string should start with Learn Java, and it will accept anything after that.

boolean bool3 = str.matches("Learn Java(.*)");

Following statement will check whether the string str matches with “(.*)Java (.*)” or not. It means, string must contain Java, and it will accept anything before or after the java word.

boolean bool4 = str.matches("(.*)Java(.*)");

Lastly, we used the System.out.println statements will to print the output

Java String matches Example

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

JAVA CODE

package StringFunctions;
import java.util.Scanner;

public class MatchMethodex {
	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.matches("(.*)java(.*)")) {
			System.out.println("Hey!! Welcome to Java Programming Language");
		}
		else {
			System.out.println("Goodbye Tutorial Gateway");
		}
	}
}

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 whether the user entered string matches with “(.*)Java (.*)” or not. It means, string must contain Java, and it will accept anything before or after the java word.

• If the statement inside the If Statement is True, System.out.println(“Hey!! Welcome to Java Programming Language”); statement will be printed
• Else System.out.println(“Goodbye to Java Tutorials”); statement will be printed

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