Changed methods from public to package-private

exercises/triangle/.meta/src/reference/java/Triangle.java

         this.uniqueSides = getNumberOfUniqueSides();
     }
 
-    public boolean isEquilateral() {
+    boolean isEquilateral() {
         return uniqueSides == 1;
     }
 
-    public boolean isIsosceles() {
+    boolean isIsosceles() {
         return uniqueSides == 2;
     }
 
-    public boolean isScalene() {
+    boolean isScalene() {
         return uniqueSides == 3;
     }
 

exercises/triangle/src/main/java/Triangle.java

         throw new UnsupportedOperationException("Delete this statement and write your own implementation.");
     }
 
-    public boolean isEquilateral() {
+    boolean isEquilateral() {
         throw new UnsupportedOperationException("Delete this statement and write your own implementation.");
     }
 
-    public boolean isIsosceles() {
+    boolean isIsosceles() {
         throw new UnsupportedOperationException("Delete this statement and write your own implementation.");
     }
 
-    public boolean isScalene() {
+    boolean isScalene() {
         throw new UnsupportedOperationException("Delete this statement and write your own implementation.");
     }