如何在打印前一个文件后重新加载java中的不同文件

Ok So this code I have below is compiling but I have a logic error. Ok so After i enter the file with the data i would like it to read and I choose to print that data on screen I have the choice of loading a different file. However, when I do enter the name of the new file that I would like to load it does not load the file and the error message that I designated for that particular situation it outputted. I think i have to flush the stream buffer after each write or something like that. So um if anyone can point of why this is happening then I would appreciate it.Ok So this code I have below is compiling but I