Last Updated : 13 Jul, 2018
The Java.util.EnumMap.putAll(
map) method in Java is used to copy all the mappings from one map to a newer one. Older mappings are replaced in a newer one.
Syntax:void putAll(map)Parameters:
The method takes one parameter
map. It is the map which is to be copied to the newer one.
Return ValueThe method does not return any value. Below programs illustrate the putAll() method:
Program 1: Java
// Java program to demonstrate keySet()
import java.util.*;
// An enum of geeksforgeeks
public enum gfg {
Global_today,
India_today,
China_today
};
class Enum_demo {
public static void main(String[] args)
{
EnumMap<gfg, Integer> mp1 =
new EnumMap<gfg, Integer>(gfg.class);
EnumMap<gfg, Integer> mp2 =
new EnumMap<gfg, Integer>(gfg.class);
// Values are associated
mp1.put(gfg.Global_today, 799);
mp1.put(gfg.India_today, 69);
// Copies all the mappings of mp1 to mp2
mp2.putAll(mp1);
// Prints the first map
System.out.println("Mappings in Map1: " + mp1);
// Prints the second map
System.out.println("Mappings in Map2: " + mp2);
}
}
Output:
Mappings in Map1: {Global_today=799, India_today=69}
Mappings in Map2: {Global_today=799, India_today=69}
Program 2: Java
// Java program to demonstrate the working of keySet()
import java.util.*;
// an enum of geeksforgeeks
// visitors in India and United States
public enum gfg {
India_today,
United_States_today
}
;
class Enum_demo {
public static void main(String[] args)
{
EnumMap<gfg, String> mp1 =
new EnumMap<gfg, String>(gfg.class);
EnumMap<gfg, String> mp2 =
new EnumMap<gfg, String>(gfg.class);
// Values are associated
mp1.put(gfg.India_today, "61.8%");
mp1.put(gfg.United_States_today, "18.2%");
// Copies all the mappings of mp1 to mp2
mp2.putAll(mp1);
// Prints the first map
System.out.println("Mappings in Map1: " + mp1);
// Prints the second map
System.out.println("Mappings in Map2: " + mp2);
}
}
Output:
Mappings in Map1: {India_today=61.8%, United_States_today=18.2%}
Mappings in Map2: {India_today=61.8%, United_States_today=18.2%}
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