String

* String

package Strings;

public class TestClassString
{

    public static void main(String[] args)
    {
        String s = "RAHMAD NASUTION";
        // or String s = new String ("RAHMAD NASUTION");

        // Returns the number of characters in the String
        System.out.println("String lenght = " + s.length());

        // Returns the character at ith index.
        System.out.println("Character at 3rd position = " + s.charAt(3));

        // Returns the substring from the ith index character
        // to end of string
        System.out.println("Subsstring " + s.substring(3));

        // Returns the substring from i to j-1 index.
        System.out.println("Substring = " + s.substring(2,5));

        // Concatenates string2 to the end string1
        String s1 = "Rahmad";
        String s2 = "Nasution";
        System.out.println("Concatenated string = " + s1.concat(s2));

        // Returns the index within the string
        // of the first occurrence of the specified string.
        String s4 = "Learn Share Learn";
        System.out.println("Index of share " + s4.indexOf("Share"));

        // Returns the index within the string of the
        // first occurence of the specified string,
        // string at the specified index.
        System.out.println("Index of a = " + s4.indexOf('a',3));

        // Checking equality of String
        Boolean out = "Rahmad".equals("Rahmad");
        System.out.println("Checking Equality " + out);
        out = "Rahmad".equals("Rahmad");
        System.out.println("Checking Equality " + out);

        out = "Rahmad".equalsIgnoreCase("Rahmad");
        System.out.println("Checking Equality " + out);

        int out1 = s1.compareTo(s2);
        System.out.println("If s1 = s2 " + out);

        // Converting cases
        String word1 = "Playing Football";
        System.out.println("Changing to Lower Case " + word1.toLowerCase());

        // Trimming the word
        String word2 = "Bassket Ball";
        System.out.println("changing to Upper Case " + word1.toUpperCase());

        // Triming the word
        String word4 = "Learn to work Sharing";
        System.out.println("Trim the word " + word4.trim());

        // Replacing characters
        String str1 = "feeksforfeeks";
        System.out.println("Original String " + str1);
        String str2 = "feeksforfeeks".replace('f', 'g');
        System.out.println("Replaced f with g -> " + str2);

    }

}