java去除字符串空格

package test;

/**
 * 去除字符串空格
 *
 * @author xusucheng
 * @create 2018-07-04
 **/
public class RemoveWhitespace {
    public static void main(String[] args) {
        String s = "He ll o, Wor ld !";
        //1.正则表达式方式:"\s"匹配任何不可见字符,包括空格,制表符,换页符等
        System.out.println(s.replaceAll("\\s+",""));
        //2.自定义方法
        System.out.println(trimAllWhitespace(s));
    }


    public static String trimAllWhitespace(String str) {
        if (str.length()==0) {
            return str;
        }
        StringBuilder sb = new StringBuilder(str);
        int index = 0;
        while (sb.length() > index) {
            if (Character.isWhitespace(sb.charAt(index))) {
                sb.deleteCharAt(index);
            }
            else {
                index++;
            }
        }
        return sb.toString();
    }


}


输出:

Hello,World!

Hello,World!






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转载自blog.csdn.net/indexman/article/details/80906369