為什么創建不出來文件呢，我也刷新了
package?InputStreamDemo;
import?java.io.File;
import?java.io.IOException;
public?class?RandomAccessFileDemo?{
RandomAccessFileDemo()throws?IOException{
File?Demo?=?new?File("Demo");
if(!Demo.exists()){
Demo.mkdir();
}
File?file?=?new?File(Demo,"file.txt");
if(!file.exists()){
file.createNewFile();
}
}
public?static?void?main(String[]?args)?{
try{
new?RandomAccessFileDemo();
???????}catch(Exception?e){
???? ???
???????}
??}
}
2016-06-30
你確定刷新了？代碼沒錯！重新創個項目再把代碼復制進去試下