Examples of java.util.List.indexOf()

java.util.List.indexOf()
Returns the index of the first occurrence of the specified element in this list, or -1 if this list does not contain the element. More formally, returns the lowest index i such that (o==null ? get(i)==null : o.equals(get(i))), or -1 if there is no such index. @param o element to search for @return the index of the first occurrence of the specified element inthis list, or -1 if this list does not contain the element @throws ClassCastException if the type of the specified elementis incompatible with this list (optional) @throws NullPointerException if the specified element is null and thislist does not permit null elements (optional)

        
        if(classes.size()!=3){
            throw new RuntimeException();
        }
        
        index = classes.indexOf(object_Enum);
        
        if(index != -1){
            throw new RuntimeException();
        }

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        if(classes.size()!=3){
            throw new RuntimeException();
        }
        
        int index = classes.indexOf(objectA);
        
        if(index == -1){
            throw new RuntimeException();
        }
        Object obj = classes.get(index);

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        if(objA.getVal3().getClass() != objectB.getClass()){
            throw new RuntimeException();
        }
        
        int bIndex = classes.indexOf(objectB);
        
        if(bIndex == -1){
            throw new RuntimeException();
        }

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        if(classes.size()!=3){
            throw new RuntimeException();
        }
        
        index = classes.indexOf(objA);
        
        if(index == -1){
            throw new RuntimeException();
        }

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        if(classes.size()!=3){
            throw new RuntimeException();
        }
        objA = new ObjectA((byte)1,(short)33,null);
        index = classes.indexOf(objA);
        
        if(index == -1){
            throw new RuntimeException();
        }

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        int[] array1 = (int[]) arrayObj;


        if(!Arrays.equals(array, array1)){
            throw new RuntimeException();
        }
        int index = classes.indexOf(objectA);
        if(index == -1){
            throw new RuntimeException();
        }
        ObjectA objectA2 = (ObjectA) classes.get(index);

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            throw new RuntimeException();
        }
        ObjectA objectA2 = (ObjectA) classes.get(index);
        
        
        index = classes.indexOf(objectB);
        if(index == -1){
            throw new RuntimeException();
        }
        
        ObjectB objectB2 = (ObjectB) classes.get(index);

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        int[] array2 = (int[]) arrayObj;


        if(!Arrays.equals(array2, array1)){
            throw new RuntimeException();
        }
        index = classes.indexOf(objectA);
        if(index == -1){
            throw new RuntimeException();
        }
        objectA2 = (ObjectA) classes.get(index);

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            throw new RuntimeException();
        }
        objectA2 = (ObjectA) classes.get(index);
        
        
        index = classes.indexOf(objectB);
        if(index == -1){
            throw new RuntimeException();
        }
        
        objectB2 = (ObjectB) classes.get(index);

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//            int[] array1 = (int[]) arrayObj;
//
//            if(!Arrays.equals(array, array1)){
//                throw new RuntimeException();
//            }
            int index = classes.indexOf(objectA);
            if(index == -1){
                throw new RuntimeException();
            }
            ObjectA objectA2 = (ObjectA) classes.get(index);

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