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labotaryPoint.java
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labotaryPoint.java
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public class labotaryPoint {
public static void main(String[] args) {
MyPoint p1 = new MyPoint(5, 7);
MyPoint p2 = new MyPoint(6, 1);
MyPoint p3 = new MyPoint(3, 9);
double d = p1.distance(p2);
System.out.println("distance of p1 and p2 : "+d);
MyTriangle t1 = new MyTriangle(p1, p2, p3);
MyPoint co = t1.getCentroid();
System.out.println("Centroid = "+co);
boolean status = MyTriangle.isTriangleValid(p1, p2, p3);
System.out.println("Validity of triangle : "+status);
System.out.println("Area of triangle : "+t1.getArea());
}
}
class MyPoint {
private int x = 0; //x1
private int y = 0; //y1
public MyPoint() {
}
public MyPoint(int x, int y) {
this.x = x;
this.y = y;
}
public int getX() {
return x;
}
public void setX(int x) {
this.x = x;
}
public int getY() {
return y;
}
public void setY(int y) {
this.y = y;
}
public void setXY(int x, int y) {
this.x = x;
this.y = y;
}
@Override
public String toString() {
return "(" + x + "," + y + ")";
}
public double distance(int x, int y) {
double a, b, c;
a = this.x - x;
b = this.y - y;
c = Math.sqrt(Math.pow(a, 2.0) + Math.pow(b, 2.0));
return c;
}
public double distance(MyPoint another) {
// int x1,x2,y1,y2;
// double a,b,c;
// x1=this.x;
// y1=this.y;
// x2=another.x;
// y2=another.y;
// a=x1-x2;
// b=y1-y2;
// c=Math.sqrt(Math.pow(a, 2.0)+Math.pow(b, 2.0));
return distance(another.x, another.y);
}
}
class MyTriangle {
private MyPoint vertex_1;
private MyPoint vertex_2;
private MyPoint vertex_3;
public MyPoint getVertex_1() {
return vertex_1;
}
public void setVertex_1(MyPoint vertex_1) {
this.vertex_1 = vertex_1;
}
public MyPoint getVertex_2() {
return vertex_2;
}
public void setVertex_2(MyPoint vertex_2) {
this.vertex_2 = vertex_2;
}
public MyPoint getVertex_3() {
return vertex_3;
}
public void setVertex_3(MyPoint vertex_3) {
this.vertex_3 = vertex_3;
}
public MyTriangle(MyPoint vertex_1, MyPoint vertex_2, MyPoint vertex_3) {
this.vertex_1 = vertex_1;
this.vertex_2 = vertex_2;
this.vertex_3 = vertex_3;
}
public MyPoint getCentroid() {
int ox, oy;
ox = (this.vertex_1.getX() + this.vertex_2.getX() + this.vertex_3.getX()) / 3;
oy = (this.vertex_1.getY() + this.vertex_2.getY() + this.vertex_3.getY()) / 3;
MyPoint centroid = new MyPoint(ox, oy);
return centroid;
}
public static boolean isTriangleValid(MyPoint vertex_1, MyPoint vertex_2, MyPoint vertex_3) {
double a, b, c;
a = vertex_1.distance(vertex_2);
b = vertex_1.distance(vertex_3);
c = vertex_3.distance(vertex_2);
if ((a + b > c) && (a + c > b) && (b + c > a)) {
return true;
} else {
return false;
}
}
public double getArea() {
double a, b, c, s, area;
a = vertex_1.distance(vertex_2);
b = vertex_1.distance(vertex_3);
c = vertex_3.distance(vertex_2);
s = (a + b + c) / 3;
area = Math.sqrt(s * (s - a) * (s - b) * (s - c));
return area;
}
public String getTriangleType() {
double a, b, c, s, area;
a = vertex_1.distance(vertex_2);
b = vertex_1.distance(vertex_3);
c = vertex_3.distance(vertex_2);
if (a == b && b == c) {
return "equilateral";
} else if (a == b || b == c || c == a) {
return "isosceles";
} else {
return "scalene";
}
}
@Override
public String toString() {
return "MyTriangle {vertex_1=" + this.vertex_1
+ ", vertex_2=" + this.vertex_2
+ ", vertex_3=" + this.vertex_3 + "}";
}
}