Answers for "how to use methods from other classes in java"

3

java call method from another class example

public class method{
  public static void sayHello(){
    System.out.println("Hello World");
  }
}
public class app{
  public static void main(String[] args){
    method m = new method(); // Creating an instance from our class
    m.sayHello(); // using the class methods by the instance we created.
  }
}
Posted by: Guest on June-18-2021
1

java classes and methods

import java.lang.Math;
import java.util.Scanner;

public class HelloWorld {
  public static void main(String[] args) {
    class ResultNumberShape {

            double number;

            public boolean isSquare(double number) {

                double result = Math.sqrt(number);
                return ((result - Math.floor(result)) == 0);

            }
        }

        ResultNumberShape checkNumber = new ResultNumberShape();

        System.out.println("Enter any number:");
        Scanner scanner = new Scanner(System.in);
        double num = scanner.nextDouble();

        scanner.close();

        if (checkNumber.isSquare(num)) {
            System.out.println(num + " is a sqaure number!");
        } else {
            System.out.println(num + " is not a square!");
        }
    
  }
}
Posted by: Guest on March-13-2020
1

java use method in another class

class A { 
  
    public void a1 ( ) { 
    } 
 
    private void a2 ( ) { 
    } 
} 
 
class B { 
 
    private A objA = new A ( ); 
 
    public void b1 ( ) { 
        // Call to method a1. This works. 
        objA.a1 (); 
    } 
 
    void b2 ( ) { 
        // Call to method a2. This will give compile error. 
        objA.a2 (); 
    } 
} 
Posted by: Guest on October-18-2020

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