Explain Strings in Java

In this we are going to learn about Strings in Java

• 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.

The follwoing example expalin's about different way's of string initilization

package com.onlinecodegeek.javase;
public class StringInitializationEx {
    public static void main(String a[]){
        String str1 = "This is a string object";
        String str2 = new String("this is also string object");
        char[] c = {'a','b','c','d'};
        String str4 = new String(c);
        String str5 = str1+" This is another String object";
        System.out.println("str1"+str1);
        System.out.println("str2"+str2);
        System.out.println("str4"+str4);
        System.out.println("str5"+str5);
    }
}

Output

str1This is a string object str2this is also string object str4abcd str5This is a string object This is another String object

 

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