java 判斷語句

import java.util.Scanner;
public class Example_32 {

	public static void main(String[] args) {
		// 條件分支
		int a = 9,b = 5,c = 7,t = 0;
		if(b<a){
			t = a;
			a = b;
			b = t;
		}
		if(c<a){
			t = a;
			a = c;
			c = t;
		}
		if(c<b){
			t = b;
			b = c;
			c = t;
		}
		System.out.println("a="+a+",b="+b+",c="+c);
		System.out.println("--------");
		int math = 65, english = 85;
		if(math>60){
			System.out.println("數學及格了");
		}
		else{
			System.out.println("數學不及格");
		}
		if(english>90){
			System.out.println("英語是優");
		}
		else{
			System.out.println("英語不是優");
		}
		System.out.println("我現在學習if-else語句");
		System.out.println("--------");
		//switch語句
		int number = 0;
		System.out.println("輸入正整數（回車確定）");
		Scanner reader = new Scanner(System.in);
		number = reader.nextInt();
		switch(number){
		case 9 :
		case 131 :
		case 12 : System.out.println(number+"是三等獎");
				  break;
		case 209 :
		case 596 :
		case 27 : System.out.println(number+"是二等獎");
		case 875:
		case 316:
		case 59: System.out.println(number+"是一等獎");
				 break;
		default: System.out.println(number+"未中獎");
		System.out.println("--------");
		//for循環
		long sum = 0,q = 8,item = q,n = 12,i = 1;
		for(i=1;i<n;i++){
			sum = sum+i;
			item = item*10+q;
		}
		System.out.println(sum);
		}
	}

}