Index
Adding Elements to List


See full Java OOP example here....

We'll add and use these helper methods for the examples:

public static void println(Object o) {
	System.println(o);
}

public void printArray(List list) {
	println("  " + Arrays.toString(list.toArray()));
}

Adding Elements to List Examples
👉🏼 Try It
//Constructing simple empty list
ArrayList<String> names = new ArrayList<String>();
println("After Initial Construction");
println(names);

//"Adding One Element at a Time"
names.add("Zoo");
names.add("Yooo");
names.add("Xoooo");
names.add("Wooo");
println("After add():");
println(names);

//"Adding Many"
ArrayList<String> newNames
	= new ArrayList<String>(Arrays.asList("Voo", "Uo", "T"));
names.addAll(newNames);
println("After addAll():");
println(names);


Removing Elements from List


Removing Elements From List Example
👉🏼 Try It
//Construct and Initialize List
String[] array = {"Zoo", "Yooo", "Xoooo", "Wooo"};
ArrayList<String> names
	= new ArrayList<String>(Arrays.asList(array));
println("Initial List");
println(names);

//Remove Elem at index=2 and index=0
names.remove(2);
names.remove(0);
println("After removing index=2 and index=0");
println(names);

//Remove All -- clear()
names.clear();
println("After clear()");
println(names);































Introduction To Objects With Java (Chapter 701 - Lists.xdoc)










Chapter 701 - Lists.xdoc Examples -- Changing Lists

Contents Constructing Changing Iterating Getting Examples

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