package demo.com.fanxing;
 
public class Num<T> {
	//定義最大最小值
	public T max;
	public T min;
	//構(gòu)造函數(shù)(無參)
	public Num() {
		super();
	}
	//構(gòu)造函數(shù)(有參)
	public Num(T max, T min) {
		super();
		this.max = max;
		this.min = min;
	}
 
	public T getMax() {
		return max;
	}
	public void setMax(T max) {
		this.max = max;
	}
	public T getMin() {
		return min;
	}
	public void setMin(T min) {
		this.min = min;
	}
	 /**
	  * 重寫輸出字符串
	  */
	@Override
	public String toString() {
		return "Num [max=" + max + ", min=" + min + "]";
	}
	
}

package demo.com.fanxing;
 
public class Compare {
 
	/**
	 * 比較最大最小值的泛型方法
	 * @param num
	 * @return
	 */
	 //這里必須在public和返回值類型中加入泛型去繼承Comparable，不然不好比較
	public <T extends Comparable<T>> Num<T> getMaxMin(T[] num){
		T max = num[0];
		T min = num[0];
		//遍歷數(shù)組，比較出最大最小值
		for (int i = 0; i < num.length; i++) {
			if (max.compareTo(num[i]) < 0) {
				max = num[i];
			}
			if (min.compareTo(num[i]) > 0) {
				min = num[i];
			}
		}
		//返回的是Num泛型類的帶參構(gòu)造的對象
		return new Num<T>(max,min);
	}
}

package demo.com.fanxing;
 
public class TestWork extends Num {
 
	public static void main(String[] args) {
		Compare compare=new Compare();
		//整型數(shù)組比較
		Integer[] num ={22,2,99,9,5,6};
		System.out.println("=======整型數(shù)組比較=======");
		System.out.println((compare.getMaxMin(num))); 
		//字符串?dāng)?shù)組比較
		String[] str = new String[] {"aas","sadx","werd","111"};
		System.out.println("=======字符串?dāng)?shù)組比較=======");
		System.out.println((compare.getMaxMin(str)));
		//Double數(shù)組比較
		Double[] dou = new Double[] {1.1,2.2,3.3,66.66,8.0};
		System.out.println("=======Double數(shù)組比較=======");
		System.out.println((compare.getMaxMin(dou)));
 
	}
}