hashmap.foreach Beispiel
hashmap.forEach((key,value) -> {
//do some things
})
Jittery Jackal
hashmap.forEach((key,value) -> {
//do some things
})for (Map.Entry<String,Integer> pair : myHashMap.entrySet()) {
System.out.println(pair.getKey());
System.out.println(pair.getValue());
}import java.util.HashMap;
import java.util.Map.Entry;
class Main {
public static void main(String[] args) {
// create a HashMap
HashMap<Integer, String> languages = new HashMap<>();
languages.put(1, "Java");
languages.put(2, "Python");
languages.put(3, "JavaScript");
System.out.println("HashMap: " + languages);
// iterate through keys only
System.out.print("Keys: ");
for (Integer key : languages.keySet()) {
System.out.print(key);
System.out.print(", ");
}
// iterate through values only
System.out.print("\nValues: ");
for (String value : languages.values()) {
System.out.print(value);
System.out.print(", ");
}
// iterate through key/value entries
System.out.print("\nEntries: ");
for (Entry<Integer, String> entry : languages.entrySet()) {
System.out.print(entry);
System.out.print(", ");
}
}
}