- 技术博客
- 练习Map集合对象进行查找世界杯冠军年份、地点、夺冠国家
class Test13{
private String yearPlay
;
private String location
;
public String
getYearPlay() {
return yearPlay
;
}
public void setYearPlay(String yearPlay
) {
this.yearPlay
= yearPlay
;
}
public String
getLocation() {
return location
;
}
public void setLocation(String location
) {
this.location
= location
;
}
public Test13(String yearPlay
, String location
) {
this.yearPlay
= yearPlay
;
this.location
= location
;
}
@Override
public String
toString() {
return "举办年份：" + yearPlay
+
" 举办地点：" + location
;
}
}
class Test14{
public static void main(String
[] args
) {
Map
<Test13, String> map
= new HashMap<>();
map
.put(new Test13("1930", "乌拉圭"), "乌拉圭");
map
.put(new Test13("1934", "意大利"), "意大利");
map
.put(new Test13("1938", "法国"), "意大利");
map
.put(new Test13("1950", "巴西"), "乌拉圭");
map
.put(new Test13("1954", "瑞士"), "西德");
map
.put(new Test13("1958", "瑞典"), "巴西");
map
.put(new Test13("1931", "乌拉圭"), "乌拉圭");
boolean flag
=true;
while (true){
System
.out
.println("*****************查找世界杯********************");
System
.out
.println("1.输入年份查找"+"\n"+"2.输入举办国家查找"+"\n"+"3.输入当年夺冠国家查找");
System
.out
.println("**********************************************");
System
.out
.println("输入你的选择：");
Scanner scanner
=new Scanner(System
.in
);
String choiceNum
=scanner
.nextLine();
switch (choiceNum
){
case "1":
findYear(map
);
break;
case "2":
findCountry(map
);
break;
case "3":
findChampionCountry(map
);
break;
case "4":
System
.exit(0);
}
}
}
public static void findYear(@NotNull Map
<Test13,String> map
){
Set
<Map
.Entry
<Test13, String>> entrySet
= map
.entrySet();
System
.out
.println("输入年份：");
Scanner scanner
= new Scanner(System
.in
);
String inputYear
= scanner
.nextLine();
boolean flag
= true;
while (flag
) {
Iterator it
= entrySet
.iterator();
while (it
.hasNext()) {
Map
.Entry
<Test13, String> entryYear
= (Map
.Entry
<Test13, String>) it
.next();
if (entryYear
.getKey().getYearPlay().equals(inputYear
)) {
System
.out
.println(entryYear
.getKey() + " 冠军是:" + entryYear
.getValue());
flag
=false;
}
}
if (flag
==true) {
System
.out
.println("没有这个时间！");
inputYear
=scanner
.nextLine();
}
}
}
public static void findCountry(@NotNull Map
<Test13,String> map
){
Set
<Map
.Entry
<Test13, String>> entrySet
= map
.entrySet();
System
.out
.println("输入举办国家：");
Scanner scanner
= new Scanner(System
.in
);
String inputCountry
= scanner
.nextLine();
boolean flag
= true;
while (flag
) {
Iterator it
= entrySet
.iterator();
while (it
.hasNext()) {
Map
.Entry
<Test13, String> entryYear
= (Map
.Entry
<Test13, String>) it
.next();
if (entryYear
.getKey().getLocation().equals(inputCountry
)) {
System
.out
.println(entryYear
.getKey() + " 冠军是:" + entryYear
.getValue());
flag
=false;
}
}
if (flag
==true) {
System
.out
.println("没有这个国家！");
inputCountry
=scanner
.next();
}
}
}
public static void findChampionCountry(@NotNull Map
<Test13,String> map
){
Set
<Map
.Entry
<Test13, String>> entrySet
= map
.entrySet();
System
.out
.println("输入夺冠国家：");
Scanner scanner
= new Scanner(System
.in
);
String inputCountry
= scanner
.nextLine();
boolean flag
= true;
while (flag
) {
Iterator it
= entrySet
.iterator();
while (it
.hasNext()) {
Map
.Entry
<Test13, String> entryYear
= (Map
.Entry
<Test13, String>) it
.next();
if (entryYear
.getValue().equals(inputCountry
)) {
System
.out
.println(entryYear
.getKey() + " 冠军是:" + entryYear
.getValue());
flag
=false;
}
}
if (flag
==true) {
System
.out
.println("没有这个国家！");
inputCountry
=scanner
.next();
}
}
}
}
