我有像这样的构造函数
public Name(String firstName, String lastName)
{
setFirstName(firstName);
setLastName(lastName);
}
public Name(String firstName, String lastName, String middleName)
{
setFirstName(firstName);
setLastName(lastName);
setMiddleName(middleName);
}
我想覆盖我的toString()方法,就像这样
@Override
public String toString()
{
if(no middle name)
{return getFirstName() + " " + getLastName();}
else if(has a middle name)
{return getFirstName() + " " + getMiddleName() + " " + getLastName();}
}
我该怎么办?
答案 0 :(得分:2)
@Override
public String toString()
{
if(middleName == null)
{return getFirstName() + " " + getLastName();}
else
{return getFirstName() + " " + getMiddleName() + " " + getLastName();}
}
您可能需要查看Guava's Strings的isNullOrEmpty(),例如(并且只有一个return
,正如riccardo.cardin指出的那样,是更好的做法):
@Override
public String toString()
{
String nameString = null;
if (Strings.isNullOrEmpty(middleName))
{
nameString = getFirstName() + " " + getLastName();
}
else
{
nameString = getFirstName() + " " + getMiddleName() + " " + getLastName();
}
return nameString;
}