Lambda表达式示例

Lambda表达式示例

1.接口

public interface LambdaInterface {

    List<String> searchNames();

}

2.需要调用接口方法的类(类似访问者模式)

public class School {

    public List<String> selectStudentNames(LambdaInterface lambdaInterface){
        System.out.println("准备调用接口方法：");
        List<String> list = lambdaInterface.searchNames();
        System.out.println("接口方法已调用：" + list.getClass() + list);
        return list;
    }
    
}

3.类方法的调用

3.1.匿名内部类调用

public static void main(String[] args) {
    School school = new School();
    //匿名内部类 new LambdaInterface()
    school.selectStudentNames(new LambdaInterface() {
        @Override
        public List<String> searchNames() {
            return new LinkedList<>();
        }
    });
}

3.2.Lambda表达式调用

public static void main(String[] args) {
    School school = new School();
    //lambda表达式
    school.selectStudentNames(() -> new ArrayList<>());
}