check if a key is in a map java code example
Example 1: check if map contains key java
if (map.containsKey(key)) {
// Okay, there's a key but the value is null
} else {
// Definitely no such key
}
Example 2: check if a key is in a map
if ( m.find("f") == m.end() ) {
// not found
} else {
// found
}