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stop asking silly question s and help me if u can,....if you can't then leave the page

it is in java.lang.object

public class Rectangle
{
private int width;
private int height;
public Rectangle(int width, int height)
{
Rectanlge x = new Rctangle(int width, int height);
int x = getCircumference();...

it says the method getDiagonal is undefined for the type Rectangle

--- Update ---

it says the mehod getDiagonal() is undefined for the type Rectangle

The UML diagram of the Rectangle class of type.lib contains the following two entries in the method compartment:
getCircumference() : int
hashCode() : int

write the app that...

public class Rectangle {

public Rectangle(int width, int height) {
Rectangle x = new Rectangle(7, 9);
double d = x.getDiagonal();
System.out.println(d);



}

so guide me through because am a beginner, I want the value of x to be displayed. ..thanks

--- Update ---

thanks

import java.lang.System;
public class Check01D {

public static void main(String[] args) {
// TODO Auto-generated method stub

double z;
z = 1.0 - "A" / 2.0 + 1.0 % 2.0;
double y;...