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

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        if(objA.getVal1() != objectA.getVal1() || objA.getVal2() != objectA.getVal2()){
            throw new RuntimeException();
        }
        
        
        int bIndex = classes.indexOf(objectB);
        
        if(bIndex == -1){
            throw new RuntimeException();
        }

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            throw new RuntimeException();
        }
        
        objA.setVal2((short) 33);
        
        int indexA2 = classes.indexOf(objectA2);
        
        ObjectA objA2 = (ObjectA) classes.get(indexA2);
        
        objA2.setVal3(null);

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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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        objA = (ObjectA) classes.get(index);
        if(objA.getVal2() != 33){
            throw new RuntimeException();
        }
        
        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();
        }
        
        index = classes.indexOf(objA);
        
        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(classes.size()!=2){
            throw new RuntimeException();
        }
        
        index = classes.indexOf(objectB);
        
        if(index == -1){
            throw new RuntimeException();
        }
        obj = classes.get(index);

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        if(classes.size()!=1){
            throw new RuntimeException();
        }
        
        index = classes.indexOf(objectA2);
        
        if(index == -1){
            throw new RuntimeException();
        }

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