'\n'是 Linux上的换行 '\r\n'才是Windows上的换行 试过了，是真的。。。

只需要把‘\’ 变成‘\\’即可

Java编写代码过程中遇到了一个问题，main方法中创建内部类的实例时，编译阶段出现错误，查看错误描述： Multiple markers at this line - The value of the local variable test is not used - No enclosing instance of type StaticCallDynamic is accessible. Must qualify the allocation with an enclosing instance of type StaticCallDynamic (e.g...

public class passwordVerify { public static void main(String[] args) { // TODO Auto-generated method stub verify(); } public static void verify() { String originalUserName = "cs1053283896@gmail.com" ; //账号密码信息 String originalUserPassword = "123456789" ; Scanner myscanner = new...

public static void main(String[] args) { // TODO Auto-generated method stub String aString = "hellocensi @gmail.com " ; System.out.println(aString); int lenthString=aString.length(); System.out.println("way1："+lenthString);//常用方法1：获取字符串长度 char str[]=aString.toCharArray(); //常用方法2 :...

public static void main(String[] args) { double sprt20=Math.sqrt(20); sprt20=(float)Math.round(sprt20*10000)/10000.0; //关键:10^n,n表示小数点后位数，且后面的10^n须带一位小数点 System.out.print(sprt20); } 结果：4.4721