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public class main { int i; String name; //クラスメソッド public static void main(String args[]){ main a = new main("taro-",1); main b = new main("hanako",3); main c = new main("sigenobu",5); main d = new main("hyoizaburou",9999999); a.battle(b); b.battle(c); c.battle(d); d.battle(a); } //コンストラクタ public main(String name, int i){ System.out.println(i + ":" + name + "!"); this.name = name; this.i = i; } //インスタンスメソッド public boolean battle(main enemy){ System.out.println(enemy.name + " VS " +this.name+" battle!!"); if(this.i < enemy.i){ System.out.println(enemy.name + " win!"); return false; } else{ System.out.println(this.name + " win!"); return true; } } }