What is Strings in Java - Programmer's Academy

What is Strings in Java

  • Strings, which are widely used in Java programming, are a sequence of characters. In Java programming language, strings are treated as objects.
  • The Java platform provides the String class to create and manipulate strings.
  • String greeting = “Santosh”;
  • Whenever it encounters a string literal in your code, the compiler creates a String object with its value.
  • As with any other object, you can create String objects by using the new keyword and a constructor. The String class has 11 constructors that allow you to provide the initial value of the string using different sources, such as an array of characters.

Syntax for string at code level

public class StringCode {

   public static void main(String args[]) {
      char[] helloArray = { 'h', 'e', 'l', 'l', 'o', '.' };
      String helloString = new String(helloArray);  
      System.out.println( helloString );
   }
}

Point to Remember − The String class is immutable, so that once it is created a String object cannot be changed. If there is a necessity to make a lot of modifications to Strings of characters, then you should use String Buffer & String Builder Classes

String Length

Methods used to obtain information about an object are known as accessor methods. One accessor method that you can use with strings is the length () method, which returns the number of characters contained in the string object.

The following program is an example of length (), method String class.

public class StringCode {

   public static void main(String args[]) {
      String text = "I have a mobile in my hand";
      int len = text.length();
      System.out.println( "String Length is : " + len );
   }
}

There are many methods for strings, you need to practice in order to make your base strong

Help Me Please: If you found any error in the content or example please let us know by comment also write your suggestion or if any doubt in the concept please feel free to write us in the comment section.

Practice your Code online here

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