关于一道JAVA作业，麻烦各位帮忙看看，很急！！！谢谢
import javax.swing.JOptionPane;
import java.util.Date;
/**
* A3Q2:Compound Interest
*
* COURSE: COMP 1010 SECTION: DE
* INSTRUCTOR: Mr. Victor Balogun
* ASSIGNMENT: 3 QUESTION: 2
* @author GuanNan Zhang, 7606172
* @version date of completion
*/
public class poin
{
double x,y;
public poin(){}
public poin(double x,double y)
{
this.x=x;
this.y=y;
}
public double distanceTo(double x,double y)
{
double distance;
distance = Math.sqrt((Math.pow(this.x,2))+(Math.pow(this.y,2)));
return distance;
}
public int getQuadrant()
{
int quadrant=0;
if (this.x>0)
{
if (this.y>0)
quadrant=1;
else
quadrant=4;
}
if(this.x<0)
{
if(this.y>0)
quadrant=2;
else
quadrant=3;
}
return quadrant;
}
public void translate(double dx, double dy)
{
double newx;
double newy;
newx=this.x+dx;
newy=this.y+dy;
System.out.println("p.toString(): Point[ x="+newx+",y="+newy+"]");
return;
}
public String toString()
{
}
public boolean isOrigin()
{
boolean origin=false;
if(this.x!=0&&this.y!=0)
origin=false;
else
origin=true;
return origin;
}
public static void main(String[] args)
{
String input;
double x;
double y;
double dx;
double dy;
input=JOptionPane.showInputDialog("please input the x");
x=Double.parseDouble(input);
input=JOptionPane.showInputDialog("please input the y");
y=Double.parseDouble(input);
input=JOptionPane.showInputDialog("please input the dx");
dx=Double.parseDouble(input);
input=JOptionPane.showInputDialog("please input the dy");
dy=Double.parseDouble(input);
poin a=new poin(x,y);
System.out.println(a.distanceTo(x,y));
System.out.println("Creating Point object, origin");
System.out.println("origin = new Point(): Point[x=0.0, y=0.0]");
System.out.println("Creating new Point object, p:");
System.out.println("p = new Point("+x+","+y+"): Point[ x="+x+",y="+y+"]");
System.out.println("p.getX(): "+x);
System.out.println("p.gety(): "+y);
System.out.println("p.translate("+dx+","+dy);
System.out.println("p.distanceTo(origin): "+a.distanceTo(x,y));
System.out.println("p.getQuadrant(): "+a.getQuadrant());
System.out.println("p.isOrigin(): "+a.isOrigin());
System.out.println("End of processing.");
}
}
现在需要在public String toString()这里来调用public void translate(double dx, double dy)
，来输出public void translate(double dx, double dy)里面计算出来的newx和newy，而且public void translate(double dx, double dy)这里的dx和dy是在public static void main(String[] args)来输入的，如何把这3者联系起来，现在我不清楚该怎样在main函数来输入dx和dy，并且在main函数调用tostring的输出newx和newy，麻烦各位帮忙把这段程序完整下，马上要交作业了，谢谢谢谢各位了
[解决办法]
import javax.swing.JOptionPane; import java.util.Date; /** * A3Q2:Compound Interest * * COURSE: COMP 1010 SECTION: DE * INSTRUCTOR: Mr. Victor Balogun * ASSIGNMENT: 3 QUESTION: 2 * @author GuanNan Zhang, 7606172 * @version date of completion */ public class poin { double x,y; public poin(){} public poin(double x,double y) { this.x=x; this.y=y; } public double distanceTo(double x,double y) { double distance; distance = Math.sqrt((Math.pow(this.x,2))+(Math.pow(this.y,2))); return distance; } public int getQuadrant() { int quadrant=0; if (this.x>0) { if (this.y>0) quadrant=1; else quadrant=4; } if(this.x <0) { if(this.y>0) quadrant=2; else quadrant=3; } return quadrant; } public void translate(double dx, double dy) { double newx; double newy; newx=this.x+dx; newy=this.y+dy; System.out.println("p.toString(): Point[ x="+newx+",y="+newy+"]"); return; } public String toString() { } public boolean isOrigin() { boolean origin=false; if(this.x!=0&&this.y!=0) origin=false; else origin=true; return origin; } public static void main(String[] args) { String input; double x; double y; double dx; double dy; input=JOptionPane.showInputDialog("please input the x"); x=Double.parseDouble(input); input=JOptionPane.showInputDialog("please input the y"); y=Double.parseDouble(input); input=JOptionPane.showInputDialog("please input the dx"); dx=Double.parseDouble(input); input=JOptionPane.showInputDialog("please input the dy"); dy=Double.parseDouble(input); poin a=new poin(x,y); System.out.println(a.distanceTo(x,y)); System.out.println("Creating Point object, origin"); System.out.println("origin = new Point(): Point[x=0.0, y=0.0]"); System.out.println("Creating new Point object, p:"); System.out.println("p = new Point("+x+","+y+"): Point[ x="+x+",y="+y+"]"); System.out.println("p.getX(): "+x); System.out.println("p.gety(): "+y); System.out.println("p.translate("+dx+","+dy); System.out.println("p.distanceTo(origin): "+a.distanceTo(x,y)); System.out.println("p.getQuadrant(): "+a.getQuadrant()); System.out.println("p.isOrigin(): "+a.isOrigin()); System.out.println("End of processing."); } }
[解决办法]
改成这样是否满意
import javax.swing.JOptionPane; import java.util.Date;/** * A3Q2:Compound Interest * * COURSE: COMP 1010 SECTION: DE * INSTRUCTOR: Mr. Victor Balogun * ASSIGNMENT: 3 QUESTION: 2 * @author GuanNan Zhang, 7606172 * @version date of completion */ public class Poin{ static double x,y; static double dx,dy;static double newx,newy;public Poin(){} public Poin(double x,double y){ this.x=x; this.y=y; } public double distanceTo(double x,double y){ double distance; distance = Math.sqrt((Math.pow(this.x,2))+(Math.pow(this.y,2))); return distance; } public int getQuadrant(){ int quadrant=0; if (this.x>0){ if (this.y>0) quadrant=1; else quadrant=4; } if(this.x <0){ if(this.y>0) quadrant=2; else quadrant=3; } return quadrant; } public void translate(double dx, double dy){ newx=this.x+dx; newy=this.y+dy; System.out.println("p.toString(): Point[ x="+newx+",y="+newy+"]"); } public String toString(){ return "p.toString(): Point[ x="+newx+",y="+newy+"]"; } public boolean isOrigin(){ boolean origin=false; if(this.x!=0&&this.y!=0) origin=false; else origin=true; return origin; } public static void main(String[] args){ String input; input=JOptionPane.showInputDialog("please input the x"); x=Double.parseDouble(input); input=JOptionPane.showInputDialog("please input the y"); y=Double.parseDouble(input); input=JOptionPane.showInputDialog("please input the dx"); dx=Double.parseDouble(input); input=JOptionPane.showInputDialog("please input the dy"); dy=Double.parseDouble(input); Poin a=new Poin(x,y); System.out.println(a.distanceTo(x,y)); System.out.println("Creating Point object, origin"); System.out.println("origin = new Point(): Point[x=0.0, y=0.0]"); System.out.println("Creating new Point object, p:"); System.out.println("p = new Point("+x+","+y+"): Point[ x="+x+",y="+y+"]"); System.out.println("p.getX(): "+x); System.out.println("p.gety(): "+y); System.out.println("p.translate("+dx+","+dy); System.out.println("p.distanceTo(origin): "+a.distanceTo(x,y)); System.out.println("p.getQuadrant(): "+a.getQuadrant()); System.out.println("p.isOrigin(): "+a.isOrigin()); System.out.println("End of processing."); } }