测试你自己的程序设计能力

自己写出string类的indexof方法？

static int indexOf2(char[] source, int sourceOffset, int sourceCount,
			char[] target, int targetOffset, int targetCount, int fromIndex) {

		
		char first = target[0];
		int max = sourceCount - targetCount;

		for (int i =0; i <= max; i++) {
			/* Look for first character. */
			if (source[i] != first) {
				while (++i <= max && source[i] != first)
					;
			}

			/* Found first character, now look at the rest of v2 */
			if (i <= max) {
				int j = i + 1;
				int end = i + targetCount;
				for (int k = 1; j < end
						&& source[j] == target[k]; j++, k++)
					;

				if (j == end) {
					/* Found whole string. */
					return i ;
				}
			}
		}
		return -1;
	}

用些我们经常用的jdk方法其实是我们学习程序设计的最好的教材。