显示System.out.println的输出

Question

How do I show the output of System.out.println("Hello World!") ?

I can only get the output when using System.err.println("Hello World!") .

I'm running the java program from the command line.

Answer 1

You should see both traces (out and err).

Have you redirected the output when running the command (for example: "java MyClass > myLogFile.log")?

Are you using pipes (for example: "java MyClass | grep something")?