7-10.cs

java基础方面的一些实例代码

//程序7-10
using System;
class Student 
{
	public int studID;
	public string studName;
}
public class Department
{
	public int DepartmentID;
	public Department()
	{ }
	public Department(int i)
	{
			DepartmentID=i;
	}
}

class CollegeStudent: Student,ICloneable 
{       
	public Department Dept;  // 引用类型
	public CollegeStudent(string nm, int sID, int dID)
	{
		studID=sID;
		studName=nm;
		Dept= new Department( dID);
	}
	// 实现ICloneable接口中的Clone方法，完成深复制
	public object Clone()
	{
		CollegeStudent CS=new CollegeStudent(this.studName, this.studID,this.Dept.DepartmentID);
		return CS;
	}
}
public class Test
{
	public static void Main() 
	{
		CollegeStudent S1 = new CollegeStudent( "Sam",2003179,001);
		// 深复制，S2中的值从S1中的所有值复制，但是S1和S2分别占用不同的存储空间
		CollegeStudent S2 = (CollegeStudent)S1.Clone();
		// 改变S1中字段的值不影响S2中的值
		S1.studName = "Bush";
		//S1.studName = "Sam";  // string类型是一个特殊的引用类型，只要字符串内容相同，则引用和值均相等
		S1.Dept.DepartmentID=002;
		Console.WriteLine(S1.studID+"  "+S1.studName+"  "+S1.Dept.DepartmentID );
		Console.WriteLine(S2.studID+"  "+S2.studName+"  "+S2.Dept.DepartmentID );
		Console.WriteLine(Object.ReferenceEquals(S1,S2));  // false
		Console.WriteLine(Object.ReferenceEquals(S1.studName,S2.studName));  // false
		Console.WriteLine(Object.ReferenceEquals(S1.Dept.DepartmentID,S2.Dept.DepartmentID));  // false
		Console.WriteLine(Object.Equals(S1.Dept.DepartmentID,S2.Dept.DepartmentID));  // false
	}
}