• August 27, 2014
  • Core Java
  • Comments Off on Substring in java

Substring in java

Substring is a string that is part of a longer string. String class provides the following methods to get a substring from a string.

1. public String substring(int startIndex):

Returns a new string which start from a specified string and extends to the end of this string.  It will throw IndexOutOfBoundsException – if startIndex is negative or larger than the length of this String object.

Example:

SubStringExample1.java

/**
 * This program is used to show the use of substring(int startIndex)  
 * method to get substrings of a given string.
 * @author javawithease
 */
class TestString{
	String str = "Hello javawithease";
 
	/**
	 * This method is used to get substrings of a given string.
	 * @author javawithease
	 */
	public void showSubString(){
		System.out.println(str.substring(6));
	}
}
 
public class SubStringExample1 {
	public static void main(String args[]){
		//creating TestString object.
		TestString obj = new TestString();
		//method call
		obj.showSubString();
	}
}

Output:

javawithease

Download this example.

2. public String substring(int startIndex, int endIndex):

Returns a new string which start from a specified string and extends to the endIndex – 1 of this string.  It will throw IndexOutOfBoundsException if the startIndex is negative, or endIndex is larger than the length of this string object, or startIndex is larger than endIndex.

Example:

SubStringExample2.java

/**
 * This program is used to show the use of 
 * substring(int startIndex, int endIndex)  
 * method to get substrings of a given string.
 * @author javawithease
 */
class TestString{
	String str = "www.javawithease.com";
 
	/**
	 * This method is used to get substrings of a given string.
	 * @author javawithease
	 */
	public void showSubString(){
		System.out.println(str.substring(4,16));
	}
}
 
public class SubStringExample2 {
	public static void main(String args[]){
		//creating TestString object.
		TestString obj = new TestString();
		//method call
		obj.showSubString();
	}
}

Output:

javawithease

Download this example.

Note: startIndex is inclusive but endIndex is exclusive.

 
Next Topic: How to write Immutable class in java with example.
Previous Topic: String concatenation in java with example.

Related Topics:

String handling in java with example.
String Comparison in java with example.
String concatenation in java with example.
Substring in java with example.
How to write Immutable class in java with example.
toString() method in java with example.
Commonly used methods of String Class with example.
charAt(int index) String function in java with example.
startsWith(String prefix) and endsWith(String suffix) String functions in java.
indexOf(String str) and lastIndexOf(String str) String functions in java.
toLowerCase() and toUpperCase() String functions in java.
intern() String functions in java with example.
length() String functions in java with example.
trim() String functions in java with example.

 


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