//Solution 19
ArrayList<Light> bulbs = new ArrayList<>(); //add Light bulbs.add(new Light()); //remove light at index 0 bulbs.remove(0); // add light bulbs.add(new Light()); // create object of Light Light b = new Light(); // add light at index 1 bulbs.add(1,b); // add light bulbs.add(new Light()); // remove light from index 0 bulbs.remove(0); // add light bulbs.add(new Light()); // remove light at index at index 2 bulbs.remove(2); // add bulb bulbs.add(new Light());
// Trick -> Count numbers of add and remove
// after subtracting add-remove we get the size
There six numbers of add and three numbers of remove
So the size is 3
Ans -> (b) 3
Solution (20)
An array list can hold only Wrapper types.
Ans: -> e
wrapper class can convert a primitive types (int , float , double, boolean, char)
to reference type(Integer, Float, Double, Boolean, Character etc.)
//Thanks
If you need any help regarding this solution....... please leave a comment...... thanks
edhesive Term 2 - Unit 5 Week 4 19. Consider the following code segment: ArrayList<Light bulbs...
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