String Handling

There are two ways to create the String object, by string literal and by new keyword.

It’s not a primitive data type like int and long. String class represents character Strings. String is used in almost all the Java applications and there are some interesting facts we should know about String. String in immutable and final in Java and JVM uses String Pool to store all the String objects.

To make Java more memory efficient (because no new objects are created if it exists already in string constant pool).

String is an immutable object. StringBuffer is a mutable object.

The toString() method returns the string representation of any object. If you print any object, java compiler internally invokes the toString() method on the object. So overriding the toString() method, returns the desired output, it can be the state of an object etc. depends on your implementation.

charAt(int), replace(String,String), split(String), equals(String), equalsIgnoreCase(String), startsWith(String), endsWith(String) etc.

length(), capacity(), setLength(int), append(String), reverse() etc.

All three are final.

Only one object will be created and this object will be stored in the string constant pool.

Using toCharArray() method.

Inside the heap memory. JVM reserves some part of the heap memory to store string objects created using string literals.

In C and C++, strings are terminated with null character. But in Java, strings are not terminated with null character. Strings are treated as objects in Java.

Yes, we can call String class methods using string literals. Here are some examples: "abc".charAt(0); "abc".indexOf('c');