package com.github.java8.lambdasinaction.chap5; public class Transaction{ private Trader trader; private int year; private int value; public Transaction(Trader trader, int year, int value) { this.trader = trader; this.year = year; this.value = value; } public Trader getTrader(){ return this.trader; } public int getYear(){ return this.year; } public int getValue(){ return this.value; } public String toString(){ return "{" + this.trader + ", " + "year: "+this.year+", " + "value:" + this.value +"}"; } }