的StackOverflowError在簡單的程序

Question

逗人，我要實現此行爲：

「侵入者就會出手，倖存者將被再次出手」

但我得到這個堆棧跟蹤：

Exception in thread "main" java.lang.StackOverflowError 
    at java.lang.String.equals(String.java:975) 
    at test.Person.isDead(Person.java:14) 
    at test.Shooter.shoot(Shooter.java:7) 
    at test.Shooter.shoot(Shooter.java:8) 
    at test.Shooter.shoot(Shooter.java:8) 
    at test.Shooter.shoot(Shooter.java:8) 
    at test.Shooter.shoot(Shooter.java:8) 
    at test.Shooter.shoot(Shooter.java:8) 
    at test.Shooter.shoot(Shooter.java:8) 
    at test.Shooter.shoot(Shooter.java:8) 
    at test.Shooter.shoot(Shooter.java:8) 
    at test.Shooter.shoot(Shooter.java:8) 
    at test.Shooter.shoot(Shooter.java:8) 
    at test.Shooter.shoot(Shooter.java:8) 
    at test.Shooter.shoot(Shooter.java:8) 
    at test.Shooter.shoot(Shooter.java:8) 
    at test.Shooter.shoot(Shooter.java:8) 
    at test.Shooter.shoot(Shooter.java:8) 
    at test.Shooter.shoot(Shooter.java:8) 
    at test.Shooter.shoot(Shooter.java:8) 
    at test.Shooter.shoot(Shooter.java:8) 
    at test.Shooter.shoot(Shooter.java:8) 
    at test.Shooter.shoot(Shooter.java:8) 
    at test.Shooter.shoot(Shooter.java:8) 
    at test.Shooter.shoot(Shooter.java:8) 
    at test.Shooter.shoot(Shooter.java:8) 

的'財產' 類：

package test; 

public class Property { 

    private Shooter shooter = new Shooter(); 

    public void punish(Person tresspasser) { 

     shooter.shoot(tresspasser); 
    } 
} 

的射擊類：

package test; 

public class Shooter { 

    public void shoot(Person person) { 

     if(!person.isDead()){ 
      shoot(person); 
     } 
    } 
} 

的 '人' 類：

package test; 

public class Person { 

    private String name; 

    public Person(String name) { 

     this.name = name; 
    } 

    public void tresspass(Property property) { 

     property.punish(this); 
    } 

    public boolean isDead(){ 

     return !name.equals("Chuck Norris"); 
    } 
} 

最後，主類：

package test; 

public class Main { 

    public static void main(String args[]) { 

     Person person = new Person("Chuck Norris"); 

     Property myProperty = new Property(); 

     person.tresspass(myProperty); 
    } 
} 

我在做什麼錯？如果這個人的名字是「查克·諾里斯」，因此你無限循環

我使用Eclipse和Java 6中，7和8出現問題...

S.

Answer 1

你的錯誤在你的Person構造函數中。添加條款

if(name.equals("Chuck Norris")){ 
    throw new ChuckNorrisException("Chuck Norris saw through your ploy to consider him a person"); 
} 

然後你會沒事的。

Answer 2

return !name.equals("Chuck Norris");始終返回false。

你可能有有限的彈藥，所以你應該考慮某種彈藥的功能。

Answer 3

在下面的代碼片段中，您在shoot上循環，而這個人還活着。由於查克·諾里斯不能死，你就會對他無限的拍攝，他結束了與StackOverflowError殺死你的程序：

public void shoot(Person person) { 

    if(!person.isDead()){ 
     shoot(person); 
    } 
} 

您可以設置彈藥的最大數量或添加firstShot參數，只允許2張。例如：

public void shoot(Person person) { 
    shoot(person, true); 
} 

private void shoot(Person person, boolean firstShot) { 
    if(firstShot && !person.isDead()) { 
     shoot(person, false); 
    } 
}