我在书上看到这个例子,
public class Employee extends object
public class Manager extends Employee
public class Contractor extends Employee
public void method (Employee e){
if (e instanceof Manager ){
}else if (e instanceof Contractor ){
}else {
}
}
}
是不是" e instanceof Manager",判断对象e是不是Manager对象?
public class Employee extends object
public class Manager extends Employee
public class Contractor extends Employee
public void method (Employee e){
if (e instanceof Manager ){
}else if (e instanceof Contractor ){
}else {
}
}
}
是不是" e instanceof Manager",判断对象e是不是Manager对象?
解决方案 »
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