为了去掉That’s中间的符号’
public class Main {
public static void main(String[] args) {
String s = "That's doing nothing.";
s.replace("o","");
System.out.println(s);
}
}
//输出结果That's doing nothing.
问题所在就是s= s.replace("","");需要一个变量在接受他的返回值
public class Main {
public static void main(String[] args) {
String s = "That's doing nothing.";
s = s.replace("","");
System.out.println(s);
}
}
//输出结果Thats doing nothing.