Szerkesztő:電愛/Java

instanceof

It checks if an object reference is an instance of a type, and returns a boolean value; The <object-reference> instanceof Object will return true for all non-null object references, since all Java objects are inherited from Object. instanceof will always return false if <object-reference> is null.

0

public class MyProgram {
    public static void main (String[] args) {
        int age = 24;
    }
}

Variable declaration statement

int age;

Assignment statements

int a = 10;
int b = 20;
int c = 30;

• A statement is a unit of code in programming.
• If we are assigning a variable a value, the statement is called an assignment statement.
• An assignment statement include three parts: a data type, variable name (also called an identifier) and the value of a variable. We will look more into the nature of identifiers and values in the section titled Variables later.

1

int firstNumber = 10;
int secondNumber = 20;
int result = firstNumber + secondNumber;