Java Code to Convert a Collection to an Array : java.util.Arrays

// Create an array containing the elements in a list
Object[] objectArray = list.toArray();
MyClass[] array = (MyClass[])list.toArray(new MyClass[list.size()]);

// Create an array containing the elements in a set
objectArray = set.toArray();
array = (MyClass[])set.toArray(new MyClass[set.size()]);

// Create an array containing the keys in a map
objectArray = map.keySet().toArray();
array = (MyClass[])map.keySet().toArray(new MyClass[set.size()]);

// Create an array containing the values in a map
objectArray = map.values().toArray();
array = (MyClass[])map.values().toArray(new MyClass[set.size()]);
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