import java.util.ArrayList;

public class Test {

    public static void main(String[] args) {

        Bufor b = new Bufor();
        b.add(new Value("test1", 1));
        b.add(new Value("test2", 2));
        b.add(new Value("test3", 3));
        System.out.print(b.toString());
        b.get();
        System.out.println("After using get");
        System.out.print(b.toString());

        if(b.isEmpty())
            System.out.println("List is empty");
        else
            System.out.println("List is not empty");

        if(b.contains(new Value("test3", 3)))
            System.out.println("List contains element with str = test3 and val = 3");
        else
            System.out.println("List doesn't contain element with str = test3 and val = 3");

        if(b.find("test5", 5) != null)
            System.out.println("List contains element with str = test5 and val = 5");
        else
            System.out.println("List doesn't contain element with str = test5 and val = 5");

    }

}

class Bufor{

    private ArrayList<Value> list;

    public Bufor(){
        list = new ArrayList<>();
    }

    @Override
    public String toString(){

        StringBuffer b = new StringBuffer();

        int i = 1;
        for(Value v : list) {
            b.append(i + ".\nstr = " + v.getStr() + "\nval = " + v.getVal() + "\n\n");
            i++;
        }

        return b.toString();
    }

    public void add(Value v){
        list.add(v);
    }

    public Value get(){
        Value v = list.get(0);
        list.remove(0);
        return v;
    }

    public boolean isEmpty(){
        return list.isEmpty();
    }

    public boolean contains(Value v){
        return list.contains(v);
    }

    public Value find(String str, int val){
        for(Value v : list){
            if(v.equals(new Value(str, val)))
                return v;
        }

        return null;
    }

}

class Value{

    private String str;
    private int val;

    public Value(String str, int val){
        this.str = str;
        this.val = val;
    }

    @Override
    public boolean equals(Object o){
        Value v = (Value)o;

        if(v.str.equals(str) && v.val == val)
            return true;

        return false;
    }

    public String getStr() {
        return str;
    }

    public void setStr(String str) {
        this.str = str;
    }

    public int getVal() {
        return val;
    }

    public void setVal(int val) {
        this.val = val;
    }
}