Java_去除字符串空格

1 String ss = "    happy new year ";
2 System.out.println(ss + "------" + ss.length());
3 //"    happy new year ------16"
4 System.out.println(ss.trim() + "------" + ss.trim().length());
5 //"happy new year------14"
6 System.out.println(ss.replaceAll(" ", "") + "------" + ss.replaceAll(" ", "").length());
7 //"    happynewyear------13"
8 System.out.println(ss.replaceAll("\\s*", "") + "------" + ss.replaceAll("\\s*", "").length());
9 //"happynewyear------12"　　\s在正则里就表示空白符