一、比较大小

public class Test {
	public static void main(String[] args) {
		//int sore[] = {88,6,8,98};
		int [] sore = new int[4];
		sore[0] = 88;
		sore[1] = 6;
		sore[2] = 8;
		sore[3] = 98;

		int max;
		int min;
		int i;
		max = min = sore[0];
		for(i=1; i<4; i++){
			if(max < sore[i]){
				max = sore[i];
			}
			if(min > sore[i]){
				min = sore[i];
			}
		}
		System.out.println("max=" + max + ",min=" + min);
	}
}

二、计算加减乘除

public class Test {
	static int add(int a, int b){
		return a+b;
	}
	int min(int a, int b){
		return a-b;
	}
	int mul(int a, int b){
		return a*b;
	}
	double div(int a,int b){
		return (double)a/b;
	}
	public static void main(String[] args) {
		Test t = new Test();
		int a = 12;
		int b = 5;
		int add,min,mul = 1;
		double div = 0.0;
		add = add(a, b);//加
		min = t.min(a, b);//减
		mul = t.min(a, b);//乘
		div = t.div(a, b);//除
		System.out.println("add=" + add);
		System.out.println("min=" + min);
		System.out.println("mul=" + mul);
		System.out.println("div=" + div);
	}
}
/*
add=17
min=7
mul=7
div=2.4
*/