关于FileInputStream会出现String() in String cannot be applied to的问题

import com.sun.org.apache.xpath.internal.operations.String;

import java.io.FileInputStream;

import java.io.IOException;

public class Demo02 {
    public static void main(String[] args) throws IOException {
        FileInputStream fis = new FileInputStream("E:/IOliu/2.txt");
        byte[] bys = new byte[3];
        int len = 0;
        while ((len = fis.read(bys))!= -1){
            System.out.println(new String(bys,0,len));
        }
        fis.close();
    }
}

这样会出现String() in String cannot be applied to:

原因是因为import com.sun.org.apache.xpath.internal.operations.String;

这个导包语句,删除即可执行