public String(String original) {
    int size = original.count;
    char[] originalValue = original.value;
    char[] v;
      if (originalValue.length > size) {
         // The array representing the String is bigger than the new
         // String itself.  Perhaps this constructor is being called
         // in order to trim the baggage, so make a copy of the array.
        v = new char[size];
         System.arraycopy(originalValue, original.offset, v, 0, size);
     } else {
         // The array representing the String is the same
         // size as the String, so no point in making a copy.
        v = originalValue;
     }
    this.offset = 0;
    this.count = size;
    this.value = v;
    }

String(int offset, int count, char value[]) {
    this.value = value;
    this.offset = offset;
    this.count = count;
}

------解决方案--------------------
嗯  估计是大企鹅把count和value弄混了...很少看见大企鹅提问啊...

------解决方案--------------------
正在努力学习中。。。
帮顶了。。。