The valueOf() is a static method present in Java it’s primary purpose is to convert primitive data types into their wrapper class object.
valueOf() Form 1
Every wrapper class except the character class contains valueOf() to create a wrapper class object for a given String.
ublic class WrapperClassInJava {
public static void main(String[] args) {
Integer i = Integer.valueOf("12");
Double d = Double.valueOf("12.5");
}
}valueOf() Form 2
Every integral type wrapper class(Byte, Short, Integer, Long) contains the following valueOf() to create a wrapper class object for the given specified radix String.
public static Integer valueOf( @NotNull String s,
int radix )The allowed range of radix is 2 to36
public class WrapperClassInJava {
public static void main(String[] args) {
Integer i = Integer.valueOf("100",2);
System.out.println(i);
}
}
valueOf() Form 3
Every wrapper class including the character class contains a valueOf() to create a wrapper object for a given primitive value.
public class WrapperClassInJava {
public static void main(String[] args) {
Character ch = Character.valueOf('a');
Integer i = Integer.valueOf(23);
}
}