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The 'int count' field in the Java AbstracStringBuilder class is set to / using which method?

My understanding is that StringBuffer uses the values ​​of the 'and' count 'fields that StringBuffer inherits from AbstractStringBuilder. The StringBuffer () constructor, for example, calls AbstractStringBuilder (int capacity) to create a 16-bit array using super (16). So far so good how to set "value", but how or in which method is "counting" set / initialized / defined?

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count

is initialized to 0 because it represents the number of characters contained in StringBuffer

. Adding characters to StringBuffer

increments the counter.

For example, adding one char increases the count by 1:



public AbstractStringBuilder append(char c) {
  int newCount = count + 1;
  if (newCount > value.length)
    expandCapacity(newCount);
  value[count++] = c; // count is incremented
  return this;
}
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