java--面向对象综合案例一

心已赠人 2022-06-02 22:45 197阅读 0赞

**Cat:**

package TESTanimal;

public class Cat \{  
private int color;  
private int height;  
public Cat(int color, int height) \{  
this.color = color;  
this.height = height;  
\}  
@Override  
public boolean equals(Object obj) \{  
if(obj==null)\{  
return false;  
  
\}else\{  
if(obj instanceof Cat)\{  
Cat c=(Cat) obj;  
if(c.color==this.color&&c.height==this.height)\{  
return true;  
\}  
  
\}  
\}  
return false;  
\}

Dog:

package TESTanimal;  
  
  
public class Dog \{  
public String name;  
public int age;  
public Dog(String name, int age) \{  
this.name = name;  
this.age = age;  
\}  
@Override  
public boolean equals(Object obj) \{  
if(obj instanceof Dog)\{  
Dog dog=(Dog) obj;  
if(dog.name.equals(this.name)&& this.age==dog.age)\{  
return true;  
\}  
\}  
return false;  
\}  
  
\}

**Test:**

package TESTanimal;  
  
  
import org.junit.Test;  
  
  
  
  
public class jTest \{  
@Test  
public void test()\{  
Cat c1=new Cat(1,2);  
Cat c2=new Cat(1,6);  
System.out.println(c1.equals(c2));  
String s1=new String("hello");  
String s2=new String("hello");  
System.out.println(s1.equals(s2));  
\}  
@Test  
public void test1()\{  
Dog\[\] arr=new Dog\[7\];  
Dog dog1=new Dog("金毛",1);  
Dog dog2 = new Dog("薩摩耶", 1);  
Dog dog3 = new Dog("博美", 2);  
Dog dog4 = new Dog("金毛", 2);  
Dog dog5 = new Dog("金毛", 1);  
Dog dog6 = new Dog("博美", 3);  
Dog dog7 = new Dog("博美", 2);  
  
arr\[0\] = dog1;  
arr\[1\] = dog2;  
arr\[2\] = dog3;  
arr\[3\] = dog4;  
arr\[4\] = dog5;  
arr\[5\] = dog6;  
arr\[6\] = dog7;  
int cnt = 0;  
for(int i=0; i<arr.length; i++)\{  
for(int j=i+1; j<arr.length; j++)\{//j=i+1  
if(arr\[i\].equals(arr\[j\]))\{  
cnt ++;  
\}  
//break;  
\}  
\}  
System.out.println("相同狗的个数是：" + cnt);  
  
  
  
\}  
\}