Page 323 - CITS - Computer Software Application -TT

COMPUTER SOFTWARE APPLICATION - CITS

Example
public class BuilderTest{
public static void main(String[] args){
StringBuilder builder=new StringBuilder(“hello”);
builder.append(“Pradyumn”);

System.out.println(builder);
}
}
Output

Indeed, the Java String class offers a wide range of methods for performing various operations on strings.
Some of the commonly used String methods include:
• compare(): Compares two strings lexicographically.

• concat(): Concatenates one string with another.
• equals(): Compares two strings for equality.
• split(): Splits a string into an array of substrings based on a delimiter.
• length(): Returns the length (number of characters) of a string.
• replace(): Replaces occurrences of a specified substring with another substring.

• compareTo(): Compares two strings lexicographically and returns an integer.
• intern(): Returns a canonical representation of the string.
• substring(): Extracts a portion of the string based on given indices etc.
There are two ways to create String object
1 By string literal

2 By new keyword
<String_Type> <string_variable> = “<sequence_of_string>”;
1 String literal
One of the advantages of using the `intern()` method in Java is to enhance memory efficiency. This is achieved
by preventing the creation of new objects if an identical string already exists in the string constant pool.
Example:
String demoString = “ctiworld”;
=

In the statement String s = new String(“Welcome”);, the JVM operates as follows:
It creates a new string object in the regular (non-pool) heap memory, and the literal “Welcome” is placed in
the string constant pool. Consequently, the variable s will point to the object in the heap (non-pool) memory.
Example

String demoString = new String (“ctiworld”);
Interfaces and Classes in Strings in Java
CharBuffer is a class that implements the CharSequence interface. Its primary purpose is to enable the
substitution of character buffers for CharSequences. An illustrative application of this capability can be found
in the java.util.regex package, where CharBuffer is used.

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CITS : IT&ITES - Computer Software Application - Lesson 78 - 84