String Class & String manipulation in Java Part-1( Simple Examples for Character array values in String,Length Method,Concatenating Method,charAt(),compareTo(),compareToIgnoreCase(),contentEquals() Methods )

Hi All,

Here I wrote the program for String Class & String manipulation in java using simple examples :)

/*

character array values in String

Length Method 

Concatenating Method 

charAt() Method 

compareTo() Method 

compareToIgnoreCase() Method 

contentEquals() Method 

*/

import java.lang.String.*;

public class stringOperations {
    public static void main(String args[]){
        /* Using character array values in String method*/
       
        char[] var1={'a','b','c','d'};
        String val=new String(var1);
        System.out.println("character array values  :" + val);
       
        /* Length Method
         *
         * Note: It used to finding Length of the string values
         */
       
        String statement="Welcome to the string method";
        System.out.println("Length of the statement string  is "+statement.length());
       
        /*  Concatenating Method
         * 
         * Note: This method appends one String to the end of another String.
         */
        String fname="SKi";
        String lname="TECH";
        String username=fname.concat(lname);
        System.out.println("Concatenation of the Strings "+username);
       
        /*  charAt() Method
         *
         * Note: This method returns the character located at the String's specified index. The string indexes start from zero.
         */
       
        String statement1="Welcome to the string method";
        char res=statement1.charAt(11);
        System.out.println("The specified index of String is "+ res);
       
        /*  compareTo() Method
         *
         *  There are two variants of this method. First method compares this String to another Object and second method compares two strings lexicographically.
         *  Note: 
         *  Less than zero (<0)         The invoking string is less than string.
            Greater than zero (>0)    The invoking string is greater than string.
            Zero (0)                    The two strings are equal. 
         */
        String small_name="skitech";
        String uppername="SKITECH";
        String name="SKITECH";
        int result=small_name.compareTo(uppername);
        System.out.println("Result of compareTo method "+result);
        int result1=uppername.compareTo(name);
        System.out.println("Reault1 of compareTo method "+result1);
       
        /* compareToIgnoreCase() Method
         *
         * Note: This method compares two strings lexicographically, ignoring case differences.
         */
        int result2=small_name.compareToIgnoreCase(uppername);
        System.out.println("Result2 of compareToIgnoreCase method (ignoring case differences) "+result2);
        int result3=uppername.compareToIgnoreCase(name);
        System.out.println("Result3 of compareToIgnoreCase mathod (ignoring case differences) "+result3);
       
        /* contentEquals() Method
         *
         * Note: This method returns true if and only if this String represents the same sequence of characters as the specified in StringBuffer(Equally same), otherwise false.
         */
        String findstring="Skitech";
        StringBuffer statement4=new StringBuffer("Skitech Corporation is an Indian software corporation headquartered in Chennai, "
                + " that develops, manufactures, licenses, and supports a wide range of products and services related to computing. "
                + " The company was founded by Balamurugan and Sri on April 1, 2010. "
                + " Skitech is the world's largest software maker ");
        StringBuffer statement5=new StringBuffer("Skitech");
        Boolean content1=findstring.contentEquals(statement4);
        System.out.println("Content1 contentEquals() Method is  "+content1);
        boolean content2=findstring.contentEquals(statement5);
        System.out.println("Content2  contentEquals() Method is "+content2);
    }
   
}

output:

character array values  :abcd

Length of the statement string  is 28

Concatenation of the Strings SKiTECH

The specified index of String is t

Result of compareTo method 32

Reault1 of compareTo method 0

Result2 of compareToIgnoreCase method (ignoring case differences) 0

Result3 of compareToIgnoreCase mathod (ignoring case differences) 0

Content1 contentEquals() Method is  false

Content2  contentEquals() Method is true