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
wait Vs sleep methods
sleep(): It is a static method on Thread class. It makes the current thread into the "Not Runnable" state for specified amount of time. During this time, the thread keeps the lock (monitors) it has acquired.

wait(): It is a method on Object class. It makes the current thread into the "Not Runnable" state. Wait is called on a object, not a thread. Before calling wait() method, the object should be synchronized, means the object should be inside synchronized block. The call to wait() releases the acquired lock.
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Reference: Java™ Platform Standard Ed. 7 - API Specification | Java is registered trademark of Oracle.
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