Java – How to change the value of a variable while debugging Java code in NetBeans 7.1

debuggingjavanetbeansnetbeans-7.1

I have set a breakpoint that allows me to see the value in a field on an object. I'd like to change the value then continue execution, but then I try to edit the value from the variables view, the value field is grayed-out. Is there any way to change variable values while debugging?

Best Answer

It is also possible to change the value of the primitive variables and Strings in-place in the Value column of Variables window. To change values of Object variables, you can use "Evaluate Expression..." under menu Debug option (Ctrl+F9).

Related Solutions

Java – How to concatenate two arrays in Java

I found a one-line solution from the good old Apache Commons Lang library.
ArrayUtils.addAll(T[], T...)

Code:

String[] both = ArrayUtils.addAll(first, second);

Java – How does the Java ‘for each’ loop work

for (Iterator<String> i = someIterable.iterator(); i.hasNext();) {
    String item = i.next();
    System.out.println(item);
}

Note that if you need to use i.remove(); in your loop, or access the actual iterator in some way, you cannot use the for ( : ) idiom, since the actual iterator is merely inferred.

As was noted by Denis Bueno, this code works for any object that implements the Iterable interface.

Also, if the right-hand side of the for (:) idiom is an array rather than an Iterable object, the internal code uses an int index counter and checks against array.length instead. See the Java Language Specification.

Best Answer

Related Solutions

Java – How to concatenate two arrays in Java

Java – How does the Java ‘for each’ loop work

Related Topic