draw.java

This is source rmi with java

import java.awt.*;
import java.awt.event.*;

public class draw extends Canvas
 {
	int coorX[],coorY[];
	int axisX[],axisY[];
	double first[]={1,2};
	int x0,y0,numberFunc;double com[];
	calculator cal;
	public draw()
	 {
		 setBackground(Color.white);
		 setSize(650,550);
		 calculate(1,first,-4,4);
	 }
	public void calculate(int numberFunc,double com[],double x1,double x2)
	 {
		 this.com=com;this.numberFunc=numberFunc;
		 cal=new calculator(numberFunc,com,x1,x2);
		 coorX=cal.getCoordinateX();
		 coorY=cal.getCoordinateY();
		 axisX=cal.getAxisX();axisY=cal.getAxisY();
		 repaint();
	 }
	public String[] getNameFunc()
	 {   calculate(1,first,-4,4);
		 return cal.getNameFunc();}
    public  int getNumberCoff(int numberFunc)
        {return cal.getNumberCoff(numberFunc);}
	public void paint(Graphics g)
	 {
		 g.setColor(Color.black);
         //draw graph
		 x0=coorX[0];y0=coorY[0];
		 for(int i=1;i<coorX.length;i++)
		  {
			g.drawLine(x0,y0,coorX[i],coorY[i]);
			if(i<coorX.length-1){x0=coorX[i];y0=coorY[i];}
			else{break;}
		  }
		 //draw axis X
		 if(numberFunc==6)
		   {g.drawLine(20,axisX[2],axisX[1]+30,axisX[2]);}
		 else
		   {g.drawLine(axisX[0],axisX[2],axisX[1]+30,axisX[2]);}
		 g.drawLine(axisX[1]+25,axisX[2]+5,axisX[1]+30,axisX[2]);
		 g.drawLine(axisX[1]+25,axisX[2]-5,axisX[1]+30,axisX[2]);
		 g.drawString("X",axisX[1]+10,axisX[2]+15);
		 //draw axis Y
		 if(com[0]>=0)
		 {
		  g.drawLine(axisY[2],axisY[0],axisY[2],axisY[1]+axisX[2]+10);
		  g.drawLine(axisY[2]-5,axisY[0]+5,axisY[2],axisY[0]);
		  g.drawLine(axisY[2]+5,axisY[0]+5,axisY[2],axisY[0]);
		   g.drawString("Y",axisY[2]+7,axisY[0]+10);
	     }
	     else
	     {
			 g.drawLine(axisY[2],axisY[0]-axisX[2],axisY[2],axisY[1]);
			 g.drawLine(axisY[2]-5,axisY[0]-axisX[2]+5,axisY[2],
			                                   axisY[0]-axisX[2]);
			 g.drawLine(axisY[2]+5,axisY[0]-axisX[2]+5,axisY[2],
			 		                           axisY[0]-axisX[2]);
		     g.drawString("Y",axisY[2]+7,axisY[0]-axisX[2]+10);
		 }
		//draw goc
		g.drawString("(0,0)",axisY[2]-30,axisX[2]-2);
		//ve cac diem chia
		g.drawLine(axisY[2]+(int)(cal.kx),axisX[2]-5,axisY[2]+
		    (int)(cal.kx),axisX[2]+5);
		g.drawString("1",axisY[2]+
		    (int)(cal.kx)-6,axisX[2]+13);
	    g.drawLine(axisY[2]-5,axisX[2]-(int)(cal.ky),axisY[2]+5,axisX[2]-
		    (int)(cal.ky));
		g.drawString("1",axisY[2]+13,axisX[2]-
		    (int)(cal.ky)+6);
	 }
 }