Head First Java习题练习（一）

14页习题BeerSong

自己稍微调整了下代码，加了一个换行，看起来段落更明显些。

public class BeerSong{
     
	public static void main(String[] args){
     
		int beerNum = 99;
		String word = "bottles";
		while (beerNum > 0) {
     
			if (beerNum == 1) {
     
				word = "bottle";
			}
			
			System.out.println(beerNum + " " + word + " of beer on the wall.");
			System.out.println("Take one down.");
			System.out.println("Pass it arount.");
			beerNum = beerNum - 1;
			
			if (beerNum > 0) {
     
				System.out.println(beerNum + " " + word + " of beer on the wall" + "\n");
			} else {
     
				System.out.println("No more bottles of beer on the wall.");
			}//else end
		}//while end
	}//main end
}//class end

20页习题排排看

class Shuffle1 {
     
	public static void main(String [] args) {
     
		int x = 3;
		while (x > 0) {
     
			if (x > 2) {
     
				System.out.print("a");
			}
			x = x - 1;
			System.out.print("-");
			if (x == 2) {
     
				System.out.print("b c");
			}
			x = x - 1;
			System.out.print("-");
			if (x == 1) {
     
				System.out.print("d");
				x = x - 1;
			}
		}
	}
}