Question

map中怎么通过key值来调用value

Answer 1

public static void main(String[] args) {
Map map = new HashMap();

map.put(1, "zhangsan");
map.put(2, "lisi");

for (int i = 0 ; i < map.size() ; i++) {
System.out.println(map.get(i));
}
}

希望对你有所帮助。

Answer 2

Map<String,String> map=new HashMap<String,String>();

map.put("1","AA");
map.put("2","BB");
map.put("3","CC");
String AA=map.get("1");
String BB=map.get("2");
String CC=map.get("3");

Answer 3

Map<String,String> map=new HashMap<String,String>();
map.put("1","AA");
map.put("2","BB");
map.put("3","CC");
String AA=map.get("1");
String BB=map.get("2");
String CC=map.get("3");

Answer 4

public static void main(String[] args) {
Map map = new HashMap();
map.put(1, "zhangsan");
map.put(2, "lisi");
for (int i = 0 ; i < map.size() ; i++) {
System.out.println(map.get(i));