CODEWITHSUNDEEP
javaeclipsestruts2
du369
du369

Reputation: 821

Eclipse, debug, expression value

Is there any way to check the value of a particular expression when debugging with eclipse? The expression view isn't always that useful.

For example:

public class P 
{
    public boolean executed = false;

    public String getSomeString() {
        if (!executed) {
            executed = true; //set executed to true,so calling this method again will not yield the same result
            return "someStr";
        }else {
            throw new RuntimeException();
        }
    }
}

Here is main method:

public class Test {
    public static void main(String[] args) {
        P p = new P();
        p.getSomeString(); //breakpoint here, I want to check the value of this expression, but it is not assign to a variable.
        System.out.println();
    }
}

I came up with this problem when I was debugging Struts2.

in the body of Dispatcher#serviceAction(), there is a line proxy.execute(); which is a String value that comes from DefaultActionInvocation#invoke(), basically the returned String from Actions. But the value of proxy.execute(); is not assigned to a variable or used anywhere inside Dispatcher#serviceAction(). So how is returned String from actions associated with the views?

Upvotes: 3

Views: 5516

Answers (2)

ManojP
ManojP

Reputation: 6248

You can check any variable value by mouse over, or just press CTRL+SHIFT+I after selecting any expression.

OR

You can add variable in watch expression of debug mode.

Upvotes: 2

Robin Schürer
Robin Schürer

Reputation: 344

Just mark the expression an press Ctrl+Shift+I or "Run"/"Inspect" from the navigation. Or you can use the "Display" view. Here you can write and store the expression, you want to check.

Upvotes: 5

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