import java.io.File;//引入File类标签:java,file,123,IOException,File,txt From: https://blog.51cto.com/softo/6022977
import java.io.IOException; //引入IOException类
public class testFile{
public static void main(String[] args)
{
File file =new File("C:\\","123.txt");//创建file对象
if(!file.exists())//判断123.txt是否存在
{
//方法createNewFile会抛出IOException异常,必须对其
//进行捕获,否则通不过编绎
try
{
file.createNewFile();
System.out.println("文件123.txt创建成功。");
}
catch(IOException ee)
{
System.out.println("文件123.txt创建失败!");
}
}
}
}