求数组中间值

package demo03;

public class ArrayAlg {
    //定义一个通用的方法,求数组的中间值
    public static <T> T getMiddle(T [] a){
        return a[a.length / 2];
    }
}







package demo03;

public class demo03 {
    public static void main(String[] args) {
        //测试能否返回字符串数组的中间值
        String [] str = new String[] {"111" , "222" , "333" , "444" , "555"};
        System.out.println(ArrayAlg.getMiddle(str));
        //测试能否返回整数数组的中间值
        Integer [] zhengshu = new Integer[] {111,222,333,444,555,666,777};
        System.out.println(ArrayAlg.getMiddle(zhengshu));
        //测试能否返回  任意类型的 数组的中间值
        Double [] xiaoshu = new Double[] {1.2 , 1.3 , 1.4 , 1.5 , 1.6};
        System.out.println(ArrayAlg.getMiddle(xiaoshu));
    }
}