原文: https://www.programiz.com/java-programming/examples/remove-whitespaces
public class Whitespaces {
public static void main(String[] args) {
String sentence = "T his is b ett er.";
System.out.println("Original sentence: " + sentence);
sentence = sentence.replaceAll("\\s", "");
System.out.println("After replacement: " + sentence);
}
}运行该程序时,输出为:
Original sentence: T his is b ett er.
After replacement: Thisisbetter.在上面的程序中,我们使用String的replaceAll()方法删除并替换字符串sentence中的所有空格。
我们使用正则表达式\\s查找字符串中的所有空白字符(制表符,空格,换行符等)。 然后,将其替换为""(空字符串字面值)。