Java String Type

String Type In Java

As we have already studied string is not a data type in Java instead String is a class that is found inside java.lang package which is automatically imported means we do not need to import the package explicitly.

String is a collection, or sequence of characters like “Ram”, “10/A”, etc.

String must be enclosed in double quotes.

In Java, String is a class, hence the first letter will be in upper case.

As String is a class the first latter of String literal will always be written in Upper case and the rest of it in a small case.

Now we will see Examples -

Example -

// Demonstrating Strings.

class StringDemo

{

public static void main(String args[])

{

String strOb1 = "First String";
String strOb2 = "Second String";
String strOb3 = strOb1 + " and " + strOb2;
System.out.println(strOb1);
System.out.println(strOb2);
System.out.println(strOb3);

}

Output -

First String

Second String

First String and Second String

Example -

// Demonstrating some String methods.

class StringDemo2 {
public static void main(String args[]) {
String strOb1 = "First String";
String strOb2 = "Second String";
String strOb3 = strOb1;
System.out.println("Length of strOb1: " +
strOb1.length());
System.out.println("Char at index 3 in strOb1: " +
strOb1.charAt(3));
if(strOb1.equals(strOb2))
System.out.println("strOb1 == strOb2");
else
System.out.println("strOb1 != strOb2");
if(strOb1.equals(strOb3))
System.out.println("strOb1 == strOb3");
else
System.out.println("strOb1 != strOb3");
}
}

Output -

Length of strOb1: 12
Char at index 3 in strOb1: s
strOb1 != strOb2
strOb1 == strOb3