Java中的“ System.in.read（）”

Question

I have a problem with this method:

public void runTransaction(){
   //Some calculations...
   wait();
   //Other calculations...
}

private static void wait(){
   try {
        System.out.println("Press <enter> to continue");
        System.in.read();
    } 
    catch (java.io.IOException ex) {
        System.out.println("Input error...");
    }
}

but the programm does not continue after pressing Enter. I'm using Ubuntu 12.04.

EDIT: the programm does print the message "Press to continue" but does not continue after that, it just waits for input.

Answer 1

This shouldn't even compile:

1. in.read() can throw an IOException , which you need to handle. ( EDIT: Looks like you fixed this issue in your snippet.)

2. You can't name this method wait() since that hides Object 's wait() .

Once these errors are corrected, the code should work as expected.

Answer 2

Does your code even compile? The wait method is public on the Object class, thus it can not be overridden as private. Try using a different method name, say waitForInput .

Answer 3

如果您将名称更改为wait_enter，您的代码应按预期运行，您只需要确保在按Enter键之前单击控制台即可注册Enter键。