Accessing Dictionary Values in Java

In Java, you access values in a HashMap using the get(key) method:

HashMap<String, Integer> scores = new HashMap<>();
scores.put("Alice", 95);
scores.put("Bob", 87);

int aliceScore = scores.get("Alice");  // 95
int bobScore = scores.get("Bob");      // 87

If the key doesn't exist, get() returns null. Use getOrDefault() to provide a fallback:

int score = scores.getOrDefault("Diana", 0);  // returns 0 if not found

Check if a key exists with containsKey():

if (scores.containsKey("Alice")) {
    System.out.println(scores.get("Alice"));
}