Class AbstractStringBuilder

lib/java/lang/AbstractStringBuilder.java:32–884

A modifiable CharSequence sequence of characters for use in creating and modifying Strings. This class is intended as a base class for StringBuffer and StringBuilder. @see StringBuffer @see StringBuilder @since 1.5

 * @since 1.5
 */
abstract class AbstractStringBuilder {

    static final int INITIAL_CAPACITY = 16;

    private char[] value;

    private int count;

    private boolean shared;

    /*
     * Returns the character array.
     */
    final char[] getValue() {
        return value;
    }

    /*
     * Returns the underlying buffer and sets the shared flag.
     */
    final char[] shareValue() {
        shared = true;
        return value;
    }

    /*
     * Restores internal state after deserialization.
     */
//    final void set(char[] val, int len) throws InvalidObjectException {
//        if (val == null) {
//            val = new char[0];
//        }
//        if (val.length < len) {
//            throw new InvalidObjectException(Messages.getString("luni.4A")); //$NON-NLS-1$
//        }
//
//        shared = false;
//        value = val;
//        count = len;
//    }

    AbstractStringBuilder() {
        value = new char[INITIAL_CAPACITY];
    }

    AbstractStringBuilder(int capacity) {
        value = new char[capacity];
    }

    AbstractStringBuilder(String string) {
        count = string.length();
        shared = false;
        value = new char[count + INITIAL_CAPACITY];
        string.getChars(0, count, value, 0);
    }

    private void enlargeBuffer(int min) {
        int newSize = ((value.length >> 1) + value.length) + 2;