abstract class AbstractStringBuilder implements Appendable, CharSequence
1 /** 2 * The value is used for character storage. 3 */ 4 char[] value; 5 6 /** 7 * The count is the number of characters used. 8 */ 9 int count;
扩容：翻倍，不够取所需最小
abstract class AbstractStringBuilder implements Appendable, CharSequence
1 /** 2 * The value is used for character storage. 3 */ 4 char[] value; 5 6 /** 7 * The count is the number of characters used. 8 */ 9 int count;
扩容：翻倍，不够取所需最小