Java String valueOf Example

String class valueOf method example.

String class valueOf method example:- This example demonstrates the working of valueOf method. this method returns String representations of all data types values

Syntax:-valueOf(boolean b)

Here is the code:-

 /**
* @(#) ValueOfString.java
* ValueOfString class demonstrates the working of valueOf() method of String class of lang package
* @version 16-May-2008
* @author Rose India Team
*/


public class ValueOfString {
public static void main(String args[]) {

  // method converts any data type value in to String type
  boolean result = true;
  int in = 234;
  char ch = 'u';
  double dou = 34.86;
  float flt = 54.889f;

  System.out.println("String represented boolean value:  "
      + String.valueOf(result)
      + "\nString represented integer value:  " + String.valueOf(in)
      + "\nString represented char value:  " + "'"
      + String.valueOf(ch) + "'"
      + "\nString represented double value:  " + String.valueOf(dou)
      + "\nString represented float value:  " + String.valueOf(flt));

}
}

Output of the program:-

String represented boolean value: true String represented integer value: 234 String represented char value: 'u' String represented double value: 34.86 String represented float value: 54.889

Java String lastIndexOf Example

String class lastIndexOf method example.

String class lastIndexOf method examle:- This example demonstrates the working of lastIndexOf method. This method returns the index or number location of letter from last of the statement.

Syntax:-lastIndexOf(String str)

Here is the code:-

 /**
* @(#) LastIndexOfString.java
* LastIndexOfString class demonstrates the working of lastIndexOf() method of String class of lang package
* @version 16-May-2008
* @author Rose India Team
*/

public class LastIndexOfString {
public static void main(String args[]) {

  String prabhu = "o paalan haari", bholenaath;
  // double quotes as arguments inside parentheses
  // Method returns last index of letter or word passes in single ang
  System.out.println("last index of letter 'i':  "
      + prabhu.lastIndexOf('i'));

  bholenaath = "bam bolo bam bolo bam bam bam";
  // here instead of index of word 'bolo', the letter which word stats
  // that is 'b', is returned and same happens every time for every word
  // or statement
  System.out.println("Index of letter 'b' is returned:  "
      + bholenaath.lastIndexOf("bolo"));
  // here were complete statement is passed in the arguments but still
  // methos returns the index of first letter only
  System.out.println("Index of letter 'o' is returned:  "
      + prabhu.lastIndexOf("o paalan haari"));
}
}

Output of the program:-

last index of letter ' i ': 13 Index of letter 'b' is returned: 13 Index of letter 'o' is returned: 0

Java String equalsIgnoreCase Example

String class equalsIgnoreCase method example

String class equalsIgnoreCase method example:- This method demonstrates the working of equalsIgnoreCase method. this method returns a boolean value after examining the two String. this method's examines without considering case senstivity

Syntax:-equalsIgnoreCase(String anotherString)

Here is the code:-

/**
* @(#) EqualsIgnoreCaseString.java
* EqualsIgnoreCaseString class demonstrates the working of equalsIgnoreCase() method of String class of lang package
* @version 15-May-2008
* @author Rose India Team
*/


public class EqualsIgnoreCaseString {
public static void main(String args[]) {

  String str = "koi mil gaya", str1 = "Koi mil gaya", str2 = "";
  boolean result = str.equalsIgnoreCase(str1);
  // Method compares two String leaving case Senstivity behind
  //Strings str and str1 are equal therefore method here returns true
  System.out.println("method returns true: " + result);

  String str3 = new String("12234");

  result = str.equalsIgnoreCase(str3);
  //Strings str and str3 are not equal
  System.out.println("false is returned: " + result);
}
}

Output of the program:-

method returns true: true false is returned: false