String in java | what is a string in java

String is a lang package in java. It's final class so immutable.

String object created two ways

1. using "new" keyword  ----> It's store the normal memory.

2. reference variable   ----> It's store the string pool.

point : 1
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String s1=new String("java");


s1 reference variable refer the object1 ['java']

if we change the s1 object1

for example

s1=s1.concat("program");


create the new object