Java中的 EnumMap get() 方法
Java中的Java .util.EnumMap.get( Object key ) 方法用于给出指定键的映射值。
句法:
get(Object key)
参数:该方法采用一个参数键,该键被传递以返回与其关联的值。
返回值:它返回与关联键映射的值。
下面的程序说明了 get()函数的工作:
方案一:
// Java program to demonstrate get(key)
import java.util.*;
// An enum of geeksforgeeks
public enum gfg {
Global,
India
}
;
class Enum_demo {
public static void main(String[] args)
{
EnumMap mp = new
EnumMap(gfg.class);
// Values are associated
mp.put(gfg.Global, 800);
mp.put(gfg.India, 72);
// Stores the value mapped with the key specified
int res = mp.get(gfg.India);
// Prints the result
System.out.println("GeeksforGeeks ranked in India: "
+ res);
}
}
输出:
GeeksforGeeks ranked in India: 72
方案二:
// Java program to demonstrate get(key)
import java.util.*;
// An enum of geeksforgeeks
public enum gfg {
India,
United_States,
China
}
;
class Enum_demo {
public static void main(String[] args)
{
EnumMap mp = new
EnumMap(gfg.class);
// Values are associated
mp.put(gfg.India, "61.7%");
mp.put(gfg.United_States, "18.2%");
mp.put(gfg.China, "2.5%");
// Stores the value mapped with the key specified
String res = mp.get(gfg.United_States);
// Prints the result
System.out.println("Visitors in United_States: "
+ res);
}
}
输出:
Visitors in United_States: 18.2%