一些简单的java代码

1.

public class Beersong {
public static void main (String[] args){
int beernum =99;
String word = "bottle";
while (beernum>0){
if (beernum == 1){
word = "bootle";
}

System.out.print(beernum+""+word+"of beer on the wall");
System.out.println(beernum+""+"of beer");
System.out.println("Take one down.");
System.out.println("passit around.");
beernum = beernum -1;

   if (beernum>0); {
    System.out.println(beernum+""+"of beer on wall");
   }
   {
    System.out.println("No more bottles of beer on the wall");
   }
}
   
}         

}

2.class Books{
String title;
String author;
}
class BookTestDrive {
public static void main(String args[]){
Books[] myBooks = new Books[3];
int x = 0;
//创建books对象
myBooks[0]=new Books();
myBooks[1]=new Books();
myBooks[2]=new Books();

myBooks[0].title="The Grapes of Java";
myBooks[1].title="The Java Gatsby";
myBooks[2].title="The Java Cookbook";

myBooks[0].author="bob";
myBooks[1].author="sue";
myBooks[2].author="ian";

while(x<3){
System.out.println(myBooks[x].title);
System.out.println("by");
System.out.println(myBooks[x].author);
x=x+1;
}
}


}

3.class Cat{
int size;

String name;
void bark(){
if(size>60){
System.out.println("Woof!Woof!");
}else if(size>14){
System.out.println("Ruff!Ruff!");
}else{
System.out.println("Yip!Yip!");
}

}
}
class DogTestDrive {
public static void main(String[] args){
Cat one = new Cat();
one.size = 70;
Cat two = new Cat();
two.size = 8;
Cat three =  new Cat();
three.size = 35;

one.bark();
two.bark();
three.bark();
}
}

4.//编写类
class Movie{
//实例对象
String title;
String genre;
int rating;
//方法
void playIt(){
    System.out.println("Playing the movie");
}
}
public class MovieTestDrive {
//编写测试用的类
   public static void main(String[] args){
  //建立movie对象
  Movie one = new Movie();
  //圆点运算符引用
  one.title = "Gone with the Stock";
  one.genre = "Tragic";
  one.rating = -2;
  
  //建立movie对象
  Movie two = new Movie();
  two.title = "Lost in Cubicle Space";
  two.genre = "Comedy";
  two.rating = 5;
 //调用方法
  two.playIt();
  
   }


}

5.

 public class SimpleDotCom {
int[] locationCells;
int numOfHits = 0;
 
public void setLocationCells(int[] locs){
locationCells = locs;
}


public String checkYourself(String StringGuess) {
int guess = Integer.parseInt(StringGuess);
String result = "miss";
for (int cell:locationCells){
if (guess == cell){
result = "hit";
numOfHits++;
break;
}
}
if(numOfHits == locationCells.length){
result = "kill";
}
System.out.println(result);
return result;
}


}

public class SimpleDotComTestDrive {
  public static void main(String[] args){
 //初始化一个SimpleDotCom对象
 SimpleDotCom dot = new SimpleDotCom();
 //创建带有dot com位置的数组
 int[] locations = {2,3,4};
 //调用dot com 的setter
 dot.setLocationCells(locations);
 //假的猜测
 String userGuess = "2";
 //调用被测方法并传入假的数据
 String result = dot.checkYourself(userGuess);  
  }
}