Strings (Part 8)

Java Strings

Strings are used for storing text.

A String variable contains a collection of characters surrounded by double quotes:

Some Methods of Strings:

Eg:-

  class MyClass {   
  public static void main(String[] args) {   
   // create string using the new keyword   
   String example = new String("Hello! World");   
   // returns the substring World   
   System.out.println("Using the subString(): " + example.substring(7));   
   // converts the string to lowercase   
   System.out.println("Using the toLowerCase(): " + example.toLowerCase());   
   // converts the string to uppercase   
   System.out.println("Using the toUpperCase(): " + example.toUpperCase());   
   // replaces the character '!' with 'o'   
   System.out.println("Using the replace(): " + example.replace('!', 'o'));   
  }   
  } 

Output:-

  Using the subString(): World   
  Using the toLowerCase(): hello! world   
  Using the toUpperCase(): HELLO! WORLD   
  Using the replace(): Helloo World   

Eg:-

  class MyClass {   
  public static void main(String[] args) {   
   // create strings   
   String first = "java programming";   
   String second = "java programming";   
   String third = "python programming";   
   // compare first and second strings   
   boolean result1 = first.equals(second);   
   System.out.println("Strings first and second are equal: " + result1);   
   //compare first and third strings   
   boolean result2 = first.equals(third);   
   System.out.println("Strings first and third are equal: " + result2);   
  }   
  } 

Output:-

  Strings first and second are equal: true   
  Strings first and third are equal: false   

As Strings is a very enormous concept , these methods and information above will let you know the working of Strings . More complicated concepts of Strings would be added in the future tutorials.So stay tuned !

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