public static void main(String[] args){ String s = new String(); String s1 = new String(); try { File f = new File("E:\\123.txt"); if(f.exists()){ System.out.print("文件存在"); }else{ System.out.print("文件不存在"); f.createNewFile();//不存在则创建 } BufferedReader input = new BufferedReader(new FileReader(f));