Java•Java How To's

Java How To Loop Through a HashMap

Loop Through a HashMap

Loop through the items of a HashMap with a for-each loop.

Note

Use the keySet() method if you only want the keys, and use the values() method if you only want the values:

Example

// Print keys
for (String i : capitalCities.keySet()) {
  System.out.println(i);
}

Example

// Print values
for (String i : capitalCities.values()) {
  System.out.println(i);
}

Example

// Print keys and values
for (String i : capitalCities.keySet()) {
  System.out.println("key: " + i + " value: " + capitalCities.get(i));
}

Java HashMap Methods

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Java•Java How To's

Loop through the items of a HashMap with a for-each loop.

Note

Use the keySet() method if you only want the keys, and use the values() method if you only want the values:

Example

// Print keys
for (String i : capitalCities.keySet()) {
  System.out.println(i);
}

Example

// Print values
for (String i : capitalCities.values()) {
  System.out.println(i);
}

Example

// Print keys and values
for (String i : capitalCities.keySet()) {
  System.out.println("key: " + i + " value: " + capitalCities.get(i));
}

Java HashMap Methods