Java的引用

原创于 2022-05-29 09:28:39 发布 · 152 阅读

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#java

创建一个名为Dog的类，包含两个String域：name和says。在main()方法中创建两个Dog对象，一个名为spot（叫声为“Ruff！”），另一个名为scruff（叫声为“Wurf！”）。然后显示它们的名字和叫声。

对对象内部成员的引用

class Dog{
   String name;
   String says;
}

public class DogTest {

   public static void main(String[] args) {
       Dog spot = new Dog();
       spot.name = "Spot";
       spot.says = "Ruff!";
       Dog scruff = new Dog();
       scruff.name = "Scruff";
       scruff.says = "Wurf!";
       System.out.println(spot.name);
       System.out.println(spot.says);
       System.out.println(scruff.name);
       System.out.println(scruff.says);

   }

}

对方法的调用

class Dog{

String name;

String says;

void setName(String n) {

name = n;

System.out.println(n);

}

void setSays(String s) {

says = s;

System.out.println(s);

}

}

public class DogTest {

public static void main(String[] args) {

Dog spot = new Dog();

spot.setName("Spot");

spot.setSays("Ruff!");

Dog scruffy = new Dog();

scruffy.setName("Scruffy");

scruffy.setSays("Wurf!");

}

}