JAVA EXAMPLE PROGRAMS

JAVA EXAMPLE PROGRAMS

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Program: Simple regex pattern matching using string matches().


Description:

String.matches() method tells whether or not this string matches the given regular expression.


Code:
package com.java2novice.regex;

public class MyStringMatches {

	public void isStringNumber(String no){

		System.out.println(no.matches("(\\d+)"));
	}
	
	public static void main(String a[]){
		MyStringMatches msm = new MyStringMatches();
		msm.isStringNumber("345");
		msm.isStringNumber("34we");
		msm.isStringNumber("345w12");
		msm.isStringNumber("956");
	}
}

Output:
true
false
false
true
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List Of Regular Expression Sample Programs:

  1. Simple regex pattern matching using string matches().
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Knowledge Centre
Class, Constructor and Primitive data types
Class is a template for multiple objects with similar features and it is a blue print for objects. It defines a type of object according to the data the object can hold and the operations the object can perform. Constructor is a special kind of method that determines how an object is initialized when created. Primitive data types are 8 types and they are: byte, short, int, long, float, double, boolean, char.
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About Author

I'm Nataraja Gootooru, programmer by profession and passionate about technologies. All examples given here are as simple as possible to help beginners. The source code is compiled and tested in my dev environment.

If you come across any mistakes or bugs, please email me to [email protected].

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Reference: Java™ Platform Standard Ed. 7 - API Specification | Java™ Platform Standard Ed. 8 - API Specification | Java is registered trademark of Oracle.
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