col, Java - rextester

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//'main' method must be in a class 'Rextester'.
//Compiler version 1.8.0_111

import java.util.LinkedList;
import java.util.List;
import java.util.stream.*;
import java.io.*;

class Rextester{
    
    static class Task{
        private String name;
        private String content;
        private int id;
        public Task(String name, String content, int id)
        {
            this.name     = name;
            this.content  = content;
            this.id  = id;
        }
        public String getName(){
            return name;
        }
        public void print()
        {
            System.out.printf("Name: %s\ncontent: %s\nid: %d\n", name, content, id);
        }
        //...
    };

public static void main(String[] args) {

LinkedList<Task> tasks = new LinkedList<Task>();
        tasks.add(new Task("Abcd", "foo", 1));
        tasks.add(new Task("Efgh", "bar", 2));
        tasks.add(new Task("Acdf", "baz", 3));

tasks.stream()
            .filter(t -> t.getName().startsWith("A")) 
            .collect(Collectors.toList())
            .forEach(Task::print);
    }
    
}

[ + ] Show input
Compilation time: 0.73 sec, absolute running time: 0.22 sec, cpu time: 0.27 sec, memory peak: 25 Mb, absolute service time: 0,96 sec