Java8Inner类实例化
为什么这段代码不编译。我正在学习用Java做谓词。这是密码
package com.java8.lambda.predicate;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.function.Predicate;
import java.util.stream.Collectors;
import com.java8.lambda.pojo.Employee;
public class PredicateSample {
public static void main(String[] args) {
Employee permanentEmployee = new Employee(70, "Jagmohan", "Sanyal", new Date(), 'M', 19900.87,"P");
Employee tempEmployee = new Employee(70, "Shruti", "Bhatia", new Date(), 'F', 1990.87,"C");
List<Employee> empList = new ArrayList<>();
empList.add(permanentEmployee);
empList.add(tempEmployee);
PredicateSample predicateSample = new PredicateSample();
//Code doesn't compile on this line due to non-visibility of EmployeePredicate class
//It fails with "PredicateSample.EmployeePredicate cannot be resolved to a type"
EmployeePredicate empPredicate = new PredicateSample().new EmployeePredicate();
}
}
class EmployeePredicate {
public Predicate<Employee> getOlderEmployee(){
return p -> p.getAge() > 60 && p.getEmploymentType().equalsIgnoreCase("P");
}
public List<Employee> filter(List<Employee> employees, Predicate<Employee> p){
return employees.stream().filter(p).collect(Collectors.toList());
}
}
我已经浏览了以下链接Inner Class Instantiation
我也访问了其他网站,但没有找到问题所在
# 1 楼答案
您需要内部类实际成为内部类