java split()使用方法解析

package _2_2_test;
public class one {
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		String str = "192.168.1.1.........3.4";
		String result1[] = str.split("\.");
		for (String s : result1) {
			System.out.println(s);
		}
		System.out.println("-------------");
		String result2[] = str.split("\.", 5);
		for (String s : result2) {
			System.out.println(s);
		}
		System.out.println("-------------");
		String result3[] = str.split("\.", -1);
		for (String s : result3) {
			System.out.println(s);
		}
		System.out.println("result1的分割份数:" + result1.length);
		System.out.println("result2的分割份数:" + result2.length);
		System.out.println("result3的分割份数:" + result3.length);
	}
}