Java java.lang.NoClassDefFoundError

[javapenguin]

---

Thanks for the info eax

[ares623]

bump lang ko sa akong question.. hehe.

suwayan nako ang suggestions sa lain forum(i called the printRectangle method with it's full name), pero wla lang gihapon ni-compile..
update:
Rectangle.java

package Geometry;
public class Rectangle{
  public Point[] corner = new Point[4];
  public Rectangle(){
    corner[0].setPoints(0,0);
    corner[1].setPoints(1,0);
    corner[2].setPoints(0,1);
    corner[3].setPoints(1,1);
  }
  public Rectangle(double point1_x,double point1_y,double point2_x, double point2_y){
    corner[0].setPoints(point1_x, point1_y);
    corner[3].setPoints(point2_x, point2_y);
    corner[1].setPoints(point2_x, point1_y);
    corner[2].setPoints(point1_x, point2_y);
  }
  public Rectangle(final Rectangle oldRect){
    corner[0] = oldRect.corner[0];
    corner[3] = oldRect.corner[3];
    corner[1] = oldRect.corner[1];
    corner[2] = oldRect.corner[2];
  }
  public double getWidth(){
    return corner[0].distance(corner[1]);
  }
  public static void printRectangle(final Rectangle rect){
    for(int i= 0;i<4;i++){
      System.out.println("Corner"+(i+1)+" X: "+rect.corner[i].getX()+" Corner"+(i+1)+" Y: \n"+rect.corner[i].getY());
    }
  }
}

MyRect.java

import Geometry.*;
public class MyRect{
  public static void main(String[] args){
    Rectangle myRect = new Rectangle(0.0,0.0,2.0,1.0);
    Rectangle.printRectangle(myRect);
  }
}

error:

MyRect.java:5: cannot find symbol
symbol : method printRectangle(Rectangle)
location: class Rectangle
        Rectangle.printRectangle(myRect);
             ^
1 error

please help.. stuck up jud ko dah

[eax]

bump lang ko sa akong question.. hehe.

suwayan nako ang suggestions sa lain forum(i called the printRectangle method with it's full name), pero wla lang gihapon ni-compile..
update:
Rectangle.java

package Geometry;
public class Rectangle{
  public Point[] corner = new Point[4];
  public Rectangle(){
    corner[0].setPoints(0,0);
    corner[1].setPoints(1,0);
    corner[2].setPoints(0,1);
    corner[3].setPoints(1,1);
  }
  public Rectangle(double point1_x,double point1_y,double point2_x, double point2_y){
    corner[0].setPoints(point1_x, point1_y);
    corner[3].setPoints(point2_x, point2_y);
    corner[1].setPoints(point2_x, point1_y);
    corner[2].setPoints(point1_x, point2_y);
  }
  public Rectangle(final Rectangle oldRect){
    corner[0] = oldRect.corner[0];
    corner[3] = oldRect.corner[3];
    corner[1] = oldRect.corner[1];
    corner[2] = oldRect.corner[2];
  }
  public double getWidth(){
    return corner[0].distance(corner[1]);
  }
  public static void printRectangle(final Rectangle rect){
    for(int i= 0;i<4;i++){
      System.out.println("Corner"+(i+1)+" X: "+rect.corner[i].getX()+" Corner"+(i+1)+" Y: \n"+rect.corner[i].getY());
    }
  }
}

MyRect.java

import Geometry.*;
public class MyRect{
  public static void main(String[] args){
    Rectangle myRect = new Rectangle(0.0,0.0,2.0,1.0);
    Rectangle.printRectangle(myRect);
  }
}

error:

MyRect.java:5: cannot find symbol
symbol : method printRectangle(Rectangle)
location: class Rectangle
        Rectangle.printRectangle(myRect);
             ^
1 error

please help.. stuck up jud ko dah

Ang problem ana kay ang imong Rectangle.java is wala ni compile kay nangita siya sa Point object nimo. Based on that codes, wala nimo gi-import ang Point object.

How did you compile it? Did you compile using "javac *.java"?

[ares623]

based sa book nga akong gi-basa, part man siya sa package so mo-compile jud og apil ang Point.java sa, nya nag-refer man pud ang Rectangle class sa Point class, so mo-compile pud daw apil daan ang Point.java... (mao man ingon sa libro, or mao akong na-sabtan.. hehe), nya Geometry.* man pud akong gi-import, so import na jud daan ang Point object diba?

Rectangle.java is in C:\Java\Packages\Geometry, along with Point.java and Line.java
MyRect.java is in My Documents
sa command line, current directory is My Documents
compile:

javac -cp ".;C:\Java\Packages" MyRect.java

thanks sa reply..

[zengatsu]

bay naa ko modified versions sa imong mga codes.. ako lang i post..
i compare nalang ang mga modified versions with the ones you have..
then, if naa ka questions.. ask nalang nya for clarifications..

Point.java, located in C:\Java\Packages\Geometry

package Geometry;
public class Point {
	public Point() {
		this.x = 0;
		this.y = 0;
	}

	public Point(double xVal, double yVal){
		x = xVal;
		y = yVal;
	}
	public Point(final Point oldPoint){
		x = oldPoint.x;
		y = oldPoint.y;
	}
	public void move(double xDelta, double yDelta){
		x += xDelta;
		y += yDelta;
	}
	public double distance(final Point aPoint){
		return (Math.sqrt((x-aPoint.x)*(x-aPoint.x) + (y-aPoint.y)*(y-aPoint.y)));
	}
	public String toString(){
		return Double.toString(x) + ", " + y;
	}
	public double getX(){
		return x;
	}
	public double getY(){
		return y;
	}
	public void setX(double inputX){
		x = inputX;
	}
	public void setY(double inputY){
		y = inputY;
	}

	public void setPoints(double x, double y) {
		this.x = x;
		this.y = y;
	}

	private double x;
	private double y;

}

Rectangle.java, located in C:\Java\Packages\Geometry

package Geometry;
public class Rectangle{

	Point[] point = null;

	public Rectangle(){
		this.initialize();
		point[0].setPoints(0,0);
		point[1].setPoints(1,0);
		point[2].setPoints(0,1);
		point[3].setPoints(1,1);
	}
	public Rectangle(double point1_x,double point1_y,double point2_x, double point2_y){
		this.initialize();
		point[0].setPoints(point1_x, point1_y);
		point[3].setPoints(point2_x, point2_y);
		point[1].setPoints(point2_x, point1_y);
		point[2].setPoints(point1_x, point2_y);
	}
	public Rectangle(final Rectangle oldRect){
		point[0] = oldRect.point[0];
		point[3] = oldRect.point[3];
		point[1] = oldRect.point[1];
		point[2] = oldRect.point[2];
	}
	public double getWidth(){
		return point[0].distance(point[1]);
	}
	public static void printRectangle(final Rectangle rect){
		for(int i= 0;i<4;i++){
			System.out.println("Corner"+(i+1)+" X: "+rect.point[i].getX()+" Corner"+(i+1)+" Y: "+rect.point[i].getY());
		}
		System.out.println();
	}

	private void initialize() {
		this.point = new Point[4];
		for (int i = 0; i < this.point.length; i++) {
			this.point[i] = new Point();
		}
	}
}

MyRect.java, located in My Documents

import Geometry.*;
public class MyRect{
  public static void main(String[] args){
    Rectangle myRect = new Rectangle(0.0,0.0,2.0,1.0);
    Rectangle.printRectangle(myRect);
  }
}

compiled with the following command:

C:\Documents and Settings\Administrator\My Documents>javac -cp ".;C:\Java\Packages" MyRect.java

run with the following command:

C:\Documents and Settings\Administrator\My Documents>java -cp ".;C:\Java\Packages" MyRect

and lastly, ang output:

Corner1 X: 0.0 Corner1 Y: 0.0
Corner2 X: 2.0 Corner2 Y: 0.0
Corner3 X: 0.0 Corner3 Y: 1.0
Corner4 X: 2.0 Corner4 Y: 1.0

main reasons for modifications sa code is NullPointerException thrown due to access of uninitialized objects and access to non-existent method, namely setPoints, inside the Rectangle class..
if naa questions, or in need of more explainations or clarifications.. post lang.. ill do my best to help..
good luck with java! :mrgreen:

[jerx d great]

maypa imo nalng nang ibuatang ug usa ka folder imong mga programs bro para dli na mo error!!!!

ug gamit ug text editor like TEXTPAD!! hehehehe

[ares623]

^Programmer's Notepad man ako gamit bai, wlay built-in compiler.. nya suwayan na pud na nako og butang usa ka-folder, pero wala man gihapon.

[zengatsu]

^Programmer's Notepad man ako gamit bai, wlay built-in compiler.. nya suwayan na pud na nako og butang usa ka-folder, pero wala man gihapon.

suwayi ang akong gisuggest bay.. tan awa kung ma ok ba..

[ares623]

suwayi ang akong gisuggest bay.. tan awa kung ma ok ba..

aw, wa ko ka-bantay atoh bai.. page 2 na man gud.. hehe. lamat au, suwayan nya nako. :mrgreen: