arrays

[Hama Kamal]

hi

could you please tell me from which class we get the

length

variable and

equals(String)

method which are shown in the code below?
are they inherited from Object class? or they are from Arrays class? in API ,,, because i searced both but i couldn't find them

class Fork {
public static void main(String[] args) {
if(args.length == 1 | args[0].equals("test")) {
System.out.println("test case");
} else {
System.out.println("production " + args[0]);
}
}
}

[Ogeh Ikem]

Every array object is an instance of an internally generated class which is an implicit extension of the Object class. This class has a public, final property called length. The JVM assigns to this property, the value that you specify when you instantiate an array. For example, the length of this array is 12

Object months = new int[12];

The equals() method is the one defined in the String class.

[bhanu chowdary]

For clarifications on the length attribute please go through this

This is something new to me. Never thought about it.

[Ogeh Ikem]

bhanu chowdary wrote:For clarifications on the length attribute please go through this

That's good but an even better reference is the Java Language Specification.

[Hama Kamal]

Object months = new int[12];

hi, thank you guys for the your replies,,, i just noted that this code

Object months = new int[12];

does not compile however when you make it

Object months = new Integer[12];

it works fine ,,,,,,, maybe autoboxing does not work here.

[Ogeh Ikem]

Hama Kamal, you might find this useful https://coderanch.com/t/260284/java-programmer-SCJP/certification/Object-new-int

[Hama Kamal]

Ogeh Ikem wrote:Hama Kamal, you might find this useful https://coderanch.com/t/260284/java-programmer-SCJP/certification/Object-new-int

thanks my friend it is really useful,, i got it.

[Ogeh Ikem]

You're Welcome.