Java String Introduction

In general, a string is nothing but a sequence of characters identified by double quote(" ").

In java,Programming each string is an object.

Java supports 4-inbuilt classes specifically used to represent and manipulate strings like:
String,StringBuffer,StringBuilder,StringTokenizer .

String Class:

String is an inbuilt class present in java.lang package, specifically used to represent and manipulate strings.
In this context there are two approaches  two  represent  strings  which  are as followed:

(Approach  1):

  • String  s1= “java”;
  • String  s2= “race”;
  • String  s3= “java”;

(SCP ---  STRING  CONSTANT  POOL)   

(Approach  2):

  • String  s1= new string(“java”);
  • String  s2= new string (“race”);
  • String  s3=  new  string(“java”);

 

HEAP

SCP

S1_ _ _ _ _

JAVA

JAVA


  • Here, each  strings  are  immutable ( non- changeable  behaviour).

 

Example:

            

            
String  s1 = “java”;                   
System.out.println(s1.concat(“race”));       

Output:  javarace

 

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