equals hashCode

package equal;



public class A
{
	private String code;
	private String name;

	public A(String code, String name)
	{
		this.code = code;
		this.name = name;
	}

	public boolean equals(Object obj)
	{
		if (obj == null)
		{
			return false;
		}

		if (this == obj)
		{
			return true;
		}

		if (this.getClass() != obj.getClass())
		{
			return false;
		}

		A a = (A) obj;
		return code.equals(a.code) && name.equals(a.name);
	}
	
	
	public static void main(String[] args)
	{
		A obj1 = new A("005129", "zwf");
		A obj2 = new A("005129", "zwf");
		A obj3 = new A("005128", "zwf");
		
		System.out.println(obj1.equals(obj2));
		System.out.println(obj1.hashCode());
		System.out.println(obj2.hashCode());
		
		System.out.println("------");
		System.out.println(obj1.equals(obj3));
		System.out.println(obj1.hashCode());
		System.out.println(obj3.hashCode());
		
		System.out.println("------");
		System.out.println("005129".hashCode());
		System.out.println(new String("005129").hashCode());
		System.out.println("005129".equals(new String("005129")));
		
		
	}
}