Java ArrayList isEmpty() to check if ArrayList is empty or not

ArrayList

ArrayList.isEmpty() Checking if any element is present inside the ArrayList.
It returns boolean value, true if the ArrayList is empty, false otherwise.

Examples with output

add()

ArrayList<String> languages = new ArrayList<String>();
System.out.println(languages.isEmpty()); // true
languages.add("Java");
languages.add("PHP");
languages.add("Python");
System.out.println(languages.isEmpty()); // false

ArrayList<Integer> marks = new ArrayList<Integer>();
System.out.println(marks.isEmpty()); // true
marks.add(55);
marks.add(54);
marks.add(55);
marks.add(54);
System.out.println(marks.isEmpty()); // false

At the second line we have a blank ArrayList ( without any elements inside ) so the isEmpty() returns true. After this we have added elements by using add() , so the last line is returning true as the ArrayList is no longer empty. ArrayList Tutorials

add() contains() clear() clone() Java - Tutorials

ArrayList.isEmpty()

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