please just help me check where is the mistake and make the program works.

just fix it.

i think the mistake would be in the method contains method in triangle.java

the following is my code

//demo

import java.util.*; public class Triangle2DDemo { public static void main(String []args) { Scanner kb=new Scanner(System.in); int x1,y1,x2,y2,x3,y3; int x11,y11,x12,y12,x13,y13; x1=kb.nextInt(); y1=kb.nextInt(); x2=kb.nextInt(); y2=kb.nextInt(); x3=kb.nextInt(); y3=kb.nextInt(); x11=kb.nextInt(); y11=kb.nextInt(); x12=kb.nextInt(); y12=kb.nextInt(); x13=kb.nextInt(); y13=kb.nextInt(); int tpx=kb.nextInt(); int tpy=kb.nextInt(); Point p1=new Point(x1,y1); Point p2=new Point(x2,y2); Point p3=new Point(x3,y3); Point p11=new Point(x11,y11); Point p12=new Point(x12,y12); Point p13=new Point(x13,y13); Triangle2D t1=new Triangle2D(p1,p2,p3); Triangle2D t2=new Triangle2D(p11,p12,p13); System.out.println(t1); System.out.println(t2); Point test = new Point(tpx, tpy); System.out.println(test); boolean bao = t1.contains(test); System.out.println("T1 contains Point :" + bao); bao=t2.contains(test); System.out.println("T2 contains Point :" + bao); bao=t1.contains(t2); System.out.println("T1 contains T2 :" + bao); bao=t2.contains(t1); System.out.println("T2 contains T1 :" + bao); bao=t1.overlaps(t2); System.out.println("Triangles overlaps:" + bao); } }

//Triangle2D.java

import java.awt.geom.Line2D; //reference form //https://docs.oracle.com/javase/7/docs/api/java/awt/geom/Line2D.Double.html public class Triangle2D { private Point p1; private Point p2; private Point p3;

public Triangle2D() {}

public Triangle2D(Point p1, Point p2, Point p3) { this.p1 = p1; this.p2 = p2; this.p3 = p3; }

public void setPoint1(Point p) { this.p1=p; } public void setPoint2(Point p) { this.p2=p; } public void setPoint3(Point p) { this.p3=p; }

/** Return the area of the triangle. */

public double getArea() { double s1=p1.distance(p2); double s2=p2.distance(p3); double s3=p3.distance(p1); double s=(s1+s2+s3)/2.0; return Math.pow(s*(s-s1)*(s-s2)*(s-s3),0.5); }

public double getPerimeter() { double s1=p1.distance(p2); double s2=p2.distance(p3); double s3=p3.distance(p1); double s=(s1+s2+s3); return s; }

public boolean contains(Point p) { double s; double pp1=p.distance(p1); double pp2=p.distance(p2); double pp3=p.distance(p3); double p1p2=p1.distance(p2); double p2p3=p2.distance(p3); double p3p1=p3.distance(p1); s=(pp1+pp2+p1p2)/2.0; double pp1p2Area=Math.pow(s*(s-pp1)*(s-pp2)*(s-p1p2),0.5); s=(pp2+pp3+p2p3)/2.0; double pp2p3Area=Math.pow(s*(s-pp2)*(s-pp3)*(s-p2p3),0.5); s=(pp3+pp1+p3p1)/2.0; double pp3p1Area=Math.pow(s*(s-pp3)*(s-pp1)*(s-p3p1),0.5); if(getArea()==(pp1p2Area+pp2p3Area+pp3p1Area)) { return true; } else { return false; } } public boolean contains(Triangle2D t) { return contains(t.p1) && contains(t.p2) && contains(t.p3); } public boolean overlaps(Triangle2D t) { Point[] pt1 = getTrianglePoints(); Point[] pt2 = t.getTrianglePoints(); // check is triangle side intersect for (int i = 0; i

private Point[] getTrianglePoints() { Point[] points = new Point[3]; points[0] = p1; points[1] = p2; points[2] = p3; return points; }

@Override public String toString() { return "Triangle: "+p1+ " "+p2+" "+p3; } }

//point class

public class Point { private int xPos; private int yPos; public Point () {} public Point(int x,int y) { xPos=x; yPos=y; } public int getXPos() { return xPos; } public int getYPos() { return yPos; } public void setXPos(int x) { xPos=x; } public void setYPos(int y) { yPos=y; } //count distance fuction public double distance(Point p) { return Math.sqrt(Math.pow(this.xPos-p.getXPos(),2) +Math.pow(this.yPos-p.getYPos(),2)); } //check if it is equal public boolean isEquals(Point p) { if(((this.xPos)==(p.getXPos()))&& ((this.yPos)==(p.getYPos()))) { return true; } else { return false; } } //check if higher public boolean isHigher(Point p) { if(this.yPos>p.getYPos()) return true; else return false; } //toString public String toString() { return "x: "+xPos+" y: "+yPos; } }

Problem 2:: Triangle 2D Instructions Use the following UML and description of methods to define the Triangle2D program Triangle2D p1: Point Point - xPos: int p2: Point yPos: int p3: Point + Point : + Point (xint, y:int) +getXPos (): int +getYPos(): int +setXPos (x: int): void + setYPos (y:int): void +distance (p: Point): double +isEquals (p: Point): boolean + isHigher (p: Point): boolean +toString): String Triangle2D ): Triangle2D (p1: Point, p2: Point, p3: Point): +getPoint1) Point +getPoint2() Point +getPoint3) Point + setPoint1 (p: Point): void +setPoint2 (p: Point): void +setPoint2 (p: Point): void +getArea(): double +getPerimeter(): double +contains (p: Point) boolearn +contains(t: Triangle2D) Boolean +overlaps (t: Triangle2D) Boolean +toString (): Strin Different scenarios: Problem 2:: Triangle 2D Instructions Use the following UML and description of methods to define the Triangle2D program Triangle2D p1: Point Point - xPos: int p2: Point yPos: int p3: Point + Point : + Point (xint, y:int) +getXPos (): int +getYPos(): int +setXPos (x: int): void + setYPos (y:int): void +distance (p: Point): double +isEquals (p: Point): boolean + isHigher (p: Point): boolean +toString): String Triangle2D ): Triangle2D (p1: Point, p2: Point, p3: Point): +getPoint1) Point +getPoint2() Point +getPoint3) Point + setPoint1 (p: Point): void +setPoint2 (p: Point): void +setPoint2 (p: Point): void +getArea(): double +getPerimeter(): double +contains (p: Point) boolearn +contains(t: Triangle2D) Boolean +overlaps (t: Triangle2D) Boolean +toString (): Strin Different scenarios