I am trying to create a program using the Eclipse IDE that does the following,

• Use Case 1: As a user, when I enter three of the same number, I want the program to tell me I have an equilateral triangle.
• Use Case 2: As a user, when I enter two numbers that are the same and a third number that will create a triangle, I want the program to tell me I have an isosceles triangle.
• Use Case 3: As a user, when I enter three different numbers that will create a triangle, I want the program to tell me I have a scalene triangle.
• Use Case 4: As a user, when I enter three values that cannot create a triangle, I want the program to tell me, Not a Triangle.

My code currently is :

import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.util.InputMismatchException; import java.util.Scanner;

public class Triangle { private static final Exception IOException = null; private static final boolean isTriangle = false; int side1,side2,side3; private static Scanner scanner; void triangle(int a, int b, int c){ side1 = a; side2 = b; side3 = c; } boolean isTriangle() { if (((side1 + side2) > side3) || ((side1 + side3) > side2) || ((side2 + side3) > side1)) return true; return false; } boolean isScalene() { return (side1 != side2 && side1 != side3); } boolean isIsosceles() { return (side1 == side2 && (side1 + side2)>side3 || side2 == side3 && (side2 + side3)>side1 || side1 == side3 && (side1 + side3)>side2); } boolean isEquilateral() { return (side1 == side2 && side1 == side3); } public static void main(String[] args) throws Exception{ throw IOException;

char in1 ='Y'; BufferedReader in = new BufferedReader(new InputStreamReader(System.in)); do { System.out.println("Enter the sides of the Triangle:"); int x,y,z; scanner = new Scanner(System.in); try { x=scanner.nextInt(); y=scanner.nextInt(); z=scanner.nextInt(); }catch (inputMistmatchExcpetion e) { System.out.println("You have input invalid numbers, only integer values are allowed for sides of a triangle"); System.out.println("Please try again. "); continue; } Triangle a,b,c; a = new Triangle(); boolean flag=a.isIsosceles(); if(flag) { System.out.println("It is an Isosceles triangle!");} else System.out.println("It is not an Isosceles triangle."); boolean flag1=a.isEquilateral(); if(flag1) { System.out.println("It is an Equilateral Triangle!");} else System.out.println("It is not an Equilateral Triangle."); boolean flag2=a.isScalene(); if(flag2) { System.out.println("It is a Scalene Triangle!");} else System.out.println("It is not a Scalene Triangle."); boolean isTriangle; if(isTriangle) { System.out.println("It is a Triangle."); }else { System.out.println("It is not a triangle."); break; } System.out.println("Sides of the triangle are:"+a.toString()); System.out.println("Do you want to Continue [Y/N]"); in1 =(char)in.read(); } while(in1=='y'||in1=='Y'); public string returnString() { return side1.toString() + ", " + side2.toString() + ", " + side3.toString(); } }

} I am getting the error on my ending string line of :

Exception in thread "main" java.lang.Error: Unresolved compilation problems: Syntax error on token "string", record expected string cannot be resolved to a type Illegal modifier for parameter returnString; only final is permitted Syntax error, insert "RecordBody" to complete RecordDeclaration

at Triangle.main(Triangle.java:79) If anyone could help me out I would greatly appreciate it, thank you.