刪除字符串中的空格

//方法一 public String removeAllSpace(String str) { String tmpstr=str.replace(" ",""); return tmpstr; } //方法二 public static void replaceBlank() { Pattern p = Pattern.compile("//s*|/t|/r|/n"); String str="I am a, I am Hello ok, /n new line ffdsa!"; System.out.println("before:"+str); Matcher m = p.matcher(str); String after = m.replaceAll(""); System.out.println("after:"+after); }