Point Class Help....Testing for invalid input

[phammon]

My program should allow the user to enter in the x-coordinate and y-coordinate to set a point. I created a method to test for invalid input using the hasNextInt() method. I know i should be using a looping structure of some sort to repeatedly ask the user for an integer if they type something in that is invalid such as a character. How can I implement this method so that it stores the users x value that they enter? Am i on the right track?
// TEST DRIVER
import java.io.*;
import java.util.*;
public class Lab4 {
public static void main (String [] args) {
Scanner input = new Scanner(System.in);
Point p1 = new Point();
Point p2 = new Point(7,13);
Point p3 = new Point(7,15);
//declare variables
int x, y, z;

System.out.println(p1.toString());
System.out.println(p2.toString());
System.out.println(p3.toString());

if (p2.isVertical(p3) == true){
System.out.println("Second point " + p2 + " Lines up vertically with third point " + p3);
}else {
System.out.println("The points do not line up vertically ");
}

if (p2.isHorizontal(p3) == true){
System.out.println("Second point " + p2 + "Lines up horizontally with third point " + p3);
}else {
System.out.println("The points do not line up horizontally ");
}
System.out.println();
System.out.println("Enter the x-coordinate for the first point: "); // this is where I'm stuck


}// end main
}



//point class

import java.util.*;
public class Point {
Scanner input = new Scanner(System.in);
private int x; // to store variables for x & y
private int y;
private int z;


//default constructor
public Point () {
x = 0;
y = 0;
z = 0;
}

//alternate constructor
public Point (int x1, int y1) {
x = x1;
y = y1;
z = 0;
}

//alternate constructor
public Point (int x1, int y1, int z1) {
x = x1;
y = y1;
z = z1;
}

//set coordinates
public void setCoord (int x1, int y1){
x = x1;
y = y1;
}
//set coordinates
public void setCoord (int x1, int y1, int z1){
x = x1;
y = y1;
z = z1;
}
public String toString() {
return "x = " + x + ", y = " + y + ", z = " + z ;
}

//print method
public void print (int x, int y) {
System.out.println(x + "," + y);

}

//toString Method
public String toString1() {
return "First Point is " + x + ", " + y + ")";
}
public String toString2() {
return "Second Point is " + x + ", " + y + ")";
}
public String toString3() {
return "Third Point is " + x + ", " + y + ")";
}

public int getX() {
return x;
}

public int getY() {
return y;
}

public int getZ() {
return z;
}

public void equals (Point p2) { // calles like if (p1.equals(p2))
if ((x==p2.getX()) && (y==p2.getY()) && (z==p2.getZ()))
System.out.println(" Coordinates are the same ");
else {
System.out.println(" Coordinates are different ");
}
}

public void copy(Point temp) {
x=temp.x;
y=temp.y;
}

public Point getCopy() {
Point temp = new Point();
temp.x = x;
temp.y = y;

return temp;
}
public boolean invalidInput(Point p){ //checks for integer input
if(!input.hasNextInt()){
System.out.println("Not an integer! Try again! Enter the x- coordinate for first point: ");
return true;
}else{
return false;
}
}


public void distanceFromOrigin(int x1, int y1) {
double dx = x-x1;
double dy = y-y1;
}

public void distance (int x1, int y1) {
double distance = Math.sqrt((x * x1) + (y * y1));
}

public void transform (int dx, int dy) {
x += dx;
y += dy;
}

public boolean isHorizontal (Point otherPoint) {
if (y == otherPoint.y) {

return true;
} else {
return false;
}
}

public boolean isVertical (Point otherPoint ) {
if (x == otherPoint.x) {
return true;

} else {
return false;
}
}

public double slope(int dx, int dy) {
int slope;

slope = (dy/dx);
return slope;
}
}

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