How to use

replace

method

in

java.util.HashMap

/**
 * @deprecated Deprecated as of 2.7.0. {@link Flash} will not be a subclass of {@link HashMap} in future Play releases.
 */
@Deprecated
@Override
public String replace(String key, String value) {
  return super.replace(key, value);
}

/**
 * @deprecated Deprecated as of 2.7.0. {@link Session} will not be a subclass of {@link HashMap} in future Play releases.
 */
@Deprecated
@Override
public String replace(String key, String value) {
  return super.replace(key, value);
}

/**
 * @deprecated Deprecated as of 2.7.0. {@link Session} will not be a subclass of {@link HashMap} in future Play releases.
 */
@Deprecated
@Override
public boolean replace(String key, String oldValue, String newValue) {
  return super.replace(key, oldValue, newValue);
}

/**
 * @deprecated Deprecated as of 2.7.0. {@link Flash} will not be a subclass of {@link HashMap} in future Play releases.
 */
@Deprecated
@Override
public String replace(String key, String value) {
  return super.replace(key, value);
}

/**
 * @deprecated Deprecated as of 2.7.0. {@link Session} will not be a subclass of {@link HashMap} in future Play releases.
 */
@Deprecated
@Override
public boolean replace(String key, String oldValue, String newValue) {
  return super.replace(key, oldValue, newValue);
}

/**
 * @deprecated Deprecated as of 2.7.0. {@link Flash} will not be a subclass of {@link HashMap} in future Play releases.
 */
@Deprecated
@Override
public String replace(String key, String value) {
  return super.replace(key, value);
}

/**
 * @deprecated Deprecated as of 2.7.0. {@link Flash} will not be a subclass of {@link HashMap} in future Play releases.
 */
@Deprecated
@Override
public boolean replace(String key, String oldValue, String newValue) {
  return super.replace(key, oldValue, newValue);
}

/**
 * @deprecated Deprecated as of 2.7.0. {@link Session} will not be a subclass of {@link HashMap} in future Play releases.
 */
@Deprecated
@Override
public String replace(String key, String value) {
  return super.replace(key, value);
}

/**
 * @deprecated Deprecated as of 2.7.0. {@link Flash} will not be a subclass of {@link HashMap} in future Play releases.
 */
@Deprecated
@Override
public boolean replace(String key, String oldValue, String newValue) {
  return super.replace(key, oldValue, newValue);
}

/**
 * @deprecated Deprecated as of 2.7.0. {@link Flash} will not be a subclass of {@link HashMap} in future Play releases.
 */
@Deprecated
@Override
public boolean replace(String key, String oldValue, String newValue) {
  return super.replace(key, oldValue, newValue);
}

/**
 * @deprecated Deprecated as of 2.7.0. {@link Session} will not be a subclass of {@link HashMap} in future Play releases.
 */
@Deprecated
@Override
public String replace(String key, String value) {
  return super.replace(key, value);
}

/**
 * @deprecated Deprecated as of 2.7.0. {@link Session} will not be a subclass of {@link HashMap} in future Play releases.
 */
@Deprecated
@Override
public boolean replace(String key, String oldValue, String newValue) {
  return super.replace(key, oldValue, newValue);
}

public void updateParameter(final String name, final String value) {
  parameters.replace(name, value);
  stale = true;
}

@Override
public String replace(String key, String value) {
  return map.replace(key, value);
}

@Override
public String replace(String key, String value) {
 return kv.replace(key.toLowerCase(), value);
}

 HashMap<String, Integer> m = new HashMap<>();
//...
//for first time ID
m.put("ID as string",1);
//...
//Counting on more ID
m.replace("ID as string",m.get("ID as string")+1);

 HashMap matcher = new HashMap<String, Integer>();
matcher.put("A", 0);
matcher.put("T", 0);
matcher.put("C", 0);

for (Character c : seq.toCharArray()) {
  String key = String.valueOf(c);

  if (matcher.containsKey(key)) {
    Integer value = (Integer) matcher.get(key);
    matcher.replace(key, new Integer(value.intValue() + 1));
  }
}

 public static void main(String[] args){
  Scanner keyboard = new Scanner(System.in);
  String[] myPhrase = keyboard.nextLine().split(" ");
  HashMap<String, Integer> myWordsCount = new HashMap<String, Integer>();
  for (String s : myPhrase){
    if (myWordsCount.containsKey(s)) myWordsCount.replace(s, myWordsCount.get(s) + 1);
    else myWordsCount.put(s, 1);
  }
  System.out.println(myWordsCount);
}

@Override
public final V replace(final K key, final V value) {
  final V replaced = super.replace(key, value);
  markAsModified(replaced != null);
  return replaced;
}

@Override
public final boolean replace(final K key, final V oldValue, final V newValue) {
  final boolean replaced = super.replace(key, oldValue, newValue);
  markAsModified(replaced);
  return replaced;
}