JAVA EXAMPLE PROGRAMS

JAVA EXAMPLE PROGRAMS

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Java String Examples

  • The String class is immutable (constant), i.e. Strings in java, once created and initialized, cannot be changed.
  • The String is a final class, no other class can extend it, and you cannot change the state of the string.
  • String values cannot be compare with '==', for string value comparision, use equals() method.
  • String class supports various methods, including comparing strings, extracting substrings, searching characters & substrings, converting into either lower case or upper case, etc.
  • The string examples given below describes more on string functionlaity.

String Sample Code Examples

Knowledge Centre
What is abstract class or abstract method?
We cannot create instance for an abstract class. We can able to create instance for its subclass only. By specifying abstract keyword just before class, we can make a class as abstract class.

public abstract class MyAbstractClass{

}

Abstract class may or may not contains abstract methods. Abstract method is just method signature, it does not containes any implementation. Its subclass must provide implementation for abstract methods. Abstract methods are looks like as given below:

public abstract int getLength();
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About Author

I'm Nataraja Gootooru, programmer by profession and passionate about technologies. All examples given here are as simple as possible to help beginners. The source code is compiled and tested in my dev environment.

If you come across any mistakes or bugs, please email me to [email protected].

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Reference: Java™ Platform Standard Ed. 7 - API Specification | Java™ Platform Standard Ed. 8 - API Specification | Java is registered trademark of Oracle.
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