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1
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So now that we have run our program, let's see what
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happens exactly when you run a program within Eclipse. And to
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do that I'm going to use the menu over here which is
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the Run menu and I'm going to select Run Configurations, and this
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brings up a window where you can change or run configurations.
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Well first of all, you can see that here on the
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left under Java application. Eclipse automatically created a Hello World run
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configuration for our program. And this is where you can configure
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the different parameters for your execution. For example,
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you can select the main class. So here
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it's, obviously, edu.gatech.HelloWorld. You can define different program
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arguments. We don't have any for now. You can
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also pass arguments to the virtual machine. You
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can define which Java runtime environment you want to
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use, Classpath and other environmental options. So let's
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now try to pass some arguments to our program.
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So for example here, I am just going to write George as
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a possible parameter. I say Apply so that modify the configuration and
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if i run the program of course, the output is not changing
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because my program does not use the argument. But, let's see if
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we do use the argument, what happens. So I'm going to slightly
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modify the final program so that now, instead of printing hello
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world, it will print hello followed by the first argument that I
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will pass to the program. And if I do that, and I
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go and I run the program, what I get is exactly what I
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was expecting, which is Hello George. So this is the way in which you
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can pass arguments to your execution, which
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is something that might come in handy
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for some other projects. When you need to run some code with an argument.
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