yeekuarray.java

疯狂Java讲义_源码(含Java设计模式CHM

import java.lang.reflect.*;
/**
 * Description:
 * <br/>Copyright (C), 2008-2010, Yeeku.H.Lee
 * <br/>This program is protected by copyright laws.
 * <br/>Program Name:
 * <br/>Date:
 * @author  Yeeku.H.Lee [e-mail]
 * @version  1.0
 */
public class YeekuArray
{
	//对Array的newInstance方法进行包装
	public static <T> T[] newInstance(Class<T> componentType, int length) 
	{
		return (T[])Array.newInstance(componentType , length);
	}

	public static void main(String[] args) 
	{
		//使用YeekuArray的newInstance()创建一维数组
		String[] arr = YeekuArray.newInstance(String.class , 10);
		//使用YeekuArray的newInstance()创建二维数组
		//在这种情况下，只要设置数组元素的类型是int[]即可。
		int[][] intArr = YeekuArray.newInstance(int[].class , 5);
		arr[5] = "ROR敏捷开发最佳实践";
		//intArr是二维数组，初始化该数组的第二个数组元素——数组元素必须是一维数组
		intArr[1] = new int[]{ 23, 12};
		System.out.println(arr[5]);
		System.out.println(intArr[1][1]);
	}
}