Java ArrayList add() to add element to an ArrayList

ArrayList.add(element) Insert element to ArrayList.
boolean : It returns true on successful addition of element at end, otherwise returns false.

Examples with output

ArrayList<String> languages = new ArrayList<String>();
languages.add("Java");
languages.add("PHP");
languages.add("Python");
languages.add("HTML");
System.out.println(languages); //[Java, PHP, Python, HTML]

Using if condition to check the status of adding element to ArrayList

ArrayList<String> languages = new ArrayList<String>();
languages.add("Java");
languages.add("PHP");
languages.add("Python");
languages.add("HTML");
if(languages.add("C++")) {
System.out.println("Successfully added  C++");
}else {
System.out.println("Failed to add C++");	
}
System.out.println(languages); //[Java, PHP, Python, HTML,C++]

Output is here

Successfully added  C++
[Java, PHP, Python, HTML, C++]

ArrayList Tutorials addAll()

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

Java

ArrayList.add()