How do you set limits in Java?

How do you set limits in Java variables?

There is no way to limit a primitive in Java. The only thing you can do is to write a wrapper class for this. Of course by doing this you lose the nice operator support and have to use methods (like BigInteger ).

How do I limit the size of a list in Java?

Java ArrayList trimToSize() Method example

It trims the capacity of ArrayList to the current list size. For e.g. An arraylist is having capacity of 15 but there are only 5 elements in it, calling trimToSize() method on this ArrayList would change the capacity from 15 to 5.

Can we overload main method?

Yes, We can overload the main method in java but JVM only calls the original main method, it will never call our overloaded main method. Output: … So, to execute overloaded methods of main, we must call them from the original main method.

Can we limit size of ArrayList?

The size limit of ArrayList is Integer. MAX_VALUE since it’s backed by an ordinary array.

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How do you set the size of an ArrayList?

To create an ArrayList of specific size, you can pass the size as argument to ArrayList constructor while creating the new ArrayList. Following the syntax to create an ArrayList with specific size. myList = new ArrayList<T>(N); where N is the capacity with which ArrayList is created.

Can we override method in Java?

Can we override java main method? No, because the main is a static method.

What is Max value in Java?

MAX_VALUE represents the maximum positive integer value that can be represented in 32 bits (i.e., 2147483647 ). This means that no number of type Integer that is greater than 2147483647 can exist in Java.

What is the limit of long in Java?

Primitive Data Types

Data Type Size Description
byte 1 byte Stores whole numbers from -128 to 127
short 2 bytes Stores whole numbers from -32,768 to 32,767
int 4 bytes Stores whole numbers from -2,147,483,648 to 2,147,483,647
long 8 bytes Stores whole numbers from -9,223,372,036,854,775,808 to 9,223,372,036,854,775,807

What is the range of data type in Java?


Type Size Range
byte 8 bits -128 .. 127
short 16 bits -32,768 .. 32,767
int 32 bits -2,147,483,648 .. 2,147,483,647
long 64 bits -9,223,372,036,854,775,808 .. 9,223,372,036,854,775,807

What is method overloading example?

In other words, we can say that Method overloading is a concept of Java in which we can create multiple methods of the same name in the same class, and all methods work in different ways. When more than one method of the same name is created in a Class, this type of method is called Overloaded Method.

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Can we have 2 main methods in Java?

A class can define multiple methods with the name main. The signature of these methods does not match the signature of the main method. These other methods with different signatures are not considered the “main” method. Yes it is possible to have two main() in the same program.

Can we override the overloaded method?

So can you override an overloaded function? Yes, since the overloaded method is a completely different method in the eyes of the compiler.