java正则表达式一些疑惑

[小时候很凶_tusiji]

String str = "abc";
Pattern pattern = Pattern.compile("[a-z]");
Matcher matcher = pattern.matcher(str);
if (matcher.matches()) {


}


为什么不匹配
我想得到的匹配结果 是
a
b
c
正则应该如何写呢

[z649010333]

Pattern pattern = Pattern.compile("[a-z]*");

[channon]

String str = "abc";
Pattern pattern = Pattern.compile("[a-z]?");
Matcher matcher = pattern.matcher(str);
while(matcher.matches()) {


}

[sky123123]

关注中。。。。

[lovezx1028]

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Test {

	/**
	 * 
	 * @param args
	 */
	public static void main(String[] args) {
		String str = "abc";
		Pattern pattern = Pattern.compile("[a-z]", Pattern.CASE_INSENSITIVE);
		Matcher matcher = pattern.matcher(str);
		for (int i = 0; i < str.length(); i++) {
			if (matcher.find()) {				
				System.out.println(matcher.group());
			}
		}
	}

}

/**结果

a
b
c


*/

[岁月之梦]

注意匹配多少次！

[wenjjing2lianee]

public static void main(String[] args) {
		String str = "abc"; 
		Pattern pattern = Pattern.compile("[a-z]",Pattern.CASE_INSENSITIVE); 
		Matcher matcher = pattern.matcher(str); 
		while (matcher.find()) { 
			System.out.println(matcher.group());
		} 

	}

http://deerchao.net/tutorials/regex/regex.htm