Question

JAVA正则表达式，matcher.find和 matcher.matches的区别

Answer 1

lookingAt() 尝试将从区域开头开始的输入序列与该模式匹配。find() 尝试查找与该模式匹配的输入序列的下一个子序列。Pattern p = Pattern.compile("cat");Matcher m = p.matcher("one cat two cats in the yard cat djskhfdkjh");StringBuffer sb = new StringBuffer();int count = 0;boolean flag = m.find();while (flag) {m.appendReplacement(sb, "dog");count++;System.out.println("这是第" + count + "次匹配后sb的内容是" + sb.toString());flag = m.find();}-------------------------------------------------Pattern p = Pattern.compile("abc");Matcher m = p.matcher("abcabcde");//目标字符串 : abcabcde;匹配的子串:abcboolean b = m.lookingAt();