import java.util.ArrayList;

public class Main {
    public static void main(String[] args) {
        ArrayList<Object> a = new ArrayList<Object>(10);
        a.add(37);
        a.add(2.452);
        a.add("dog");
        a.add('c');
        a.add(2, true);

        // Print using ArrayList toString method.
        System.out.println(a);

        // Test contains method
        System.out.println(a.contains("dog"));
        
        // Test remove method.
        a.remove(1);
        System.out.println(a + " " + a.size( ));
        
        // Test set method
        a.set(2, "cat");
        System.out.println(a + " " + a.size( ));

        // Test toArray method
        Object[ ] arr = a.toArray( );
        for(Object x : arr) {
            System.out.println(x);
        }
        
        // Test clear method
        a.clear( );
        System.out.println(a + " " + a.size( ));        
    
        // Alternative ways to print the ArrayList contents.
        
        // (1) Print with traditional loop.
        for(int i = 0; i < a.size( ); i++) {
            System.out.print(a.get(i) + " ");
        }
        System.out.println( );

        // Print with modern for each loop.
        for(Object obj : a) {
            System.out.print(obj + " ");
        }
        System.out.println( );

    }
}