java - 缺少返回语句错误

Question

我已经编写了一段代码，每当我尝试测试它时，都会收到一条错误消息:

"StreetAddress.java:62: missing return statement 

 }"

这是代码:

public class StreetAddress
  {
     private String myStreet;
     private String myCity;
     private String myState;
     private String myZip;

 public StreetAddress( String street, String city, String state, String zip )
 {
  myStreet = street;
  myCity = city;
  myState = state;
  myZip = zip;
 }

 public void setStreet( String street )
{
 myStreet = street;
}

 public String getStreet()
{
 return myStreet;
}

 public void setCity( String city )
{
 myCity = city;
}

 public String getCity()
{
 return myCity;
}

 public void setState( String state )
{
 myState = state;
}

 public String getState()
{
 return myState;
}

 public void setZIP( String zip )
{
 myZip = zip;
}

 public String getZIP()
{
 return myZip;
}

public String mailingLabel()
{
 System.out.println( getStreet() );
 System.out.println( getCity() + ", " + getState() + " " + getZIP() );
}
}
}

我不知道哪里缺少 } 我已经检查了我的代码好几次了。请帮忙!

Answer 1

这个函数:

public String mailingLabel()
{
 System.out.println( getStreet() );
 System.out.println( getCity() + ", " + getState() + " " + getZIP() );
}

被声明返回一个字符串，但缺少 return 语句。要么使其无效，要么返回某些内容 - 无论其意图如何。