【说明】
球类比赛记分系统中，每场有两支球队(Team)进行比赛(Game)，分别记录各自的得分。图5-1所示为记分系统的类图。

【Java代码】
class Team {
private String name;
private ( );
public Team(String name){
( )= name;
}

voidincreamentGoal ( ){
( );
}

intgetGoals( ){
return goals;
}

String getName( ){
return name;
}
}；
class Game{
private Team a, b; //两支比赛球队

public Game(Team t1, Team t2){
a = t1;
b = t2;
}

void getResults ( ) { //输出比分
System.out .print (a. getName ( ) + " : " + b.getName ( ) + "==");
System.out.println(a.getGoals( ) + ":" + b.getGoals( ));
}
void incrementGoal ( ( ) t) { //球队t进1球
t.increamentGoal {);
}

public static void main(String... args){
Team t1 =:new Team("TA");
Team t2 =:new Team("TB");
Game football = ( );

football.incrementGoal(t1);
football.incrementGoal(t2);
football.getResuIts( ); //输出为：TA:TB =:1:1
football.incrementGoal(t2);
football.getResuIts( ); //输出为:TA:TB ==1:2
}
}；