![]() Press F5, you will be taken into increment.Repeat steps 1 and 2, i and array will change.Press F6 (will do F5 next iteration), now pos is highlighted since the method assigned a new value to it.Press F5 of F6, you will see a yellow highlight on the of array with its new value -1 as assigned in the code (you have to have the array variable expanded).Press F5 of F6, you will see that in view 1, the variable i was added since it was creating in the while loop.Ctrl-R - run to line: this will run the code until the line where you placed the caret at. ![]() F7 - step return: this will run the code until the current method returns (if applicable).It can be the same breakpoint in the editor if you are running in a loop, for example. F8 - resume: this will run the code until the next breakpoint is reached.Sometimes their code is very complicated and if you continue stepping into it you might never come back. Note that if you have the JDK (or the JRE with source attached), it will step into Oracle's libraries, which is usually not something you want. F5 - step into: this will advance to the next line in the code and will enter method calls.F6 - step over: this will advance to the next line in the code while skipping method calls.You will find many option under the Run menu, but the useful ones are: Here you will see that the thread main is suspended with the reason breakpoint at line 9, which is what it's supposed to be. When you run multi-thread programs, it will list all the threads and their state. Here the code is at the breakpoint, because this is where it will stop for the first time. The normal editor, but with a highlighter that shows you where the code is at.Some objects are long and complicated, so it's handy to see it there. Displays the values of the selected line the view above.Whenever there is a c change in one of those values, it will be highlighted in yellow. For objects (class instances and arrays), you will have an expand arrow to show their class members and properties. View listing all the variables (including fields, arrays etc.) and their value.You will then be taken to the Debug perspective, which offers different views (my views are rearranged from the default): Make sure it's not the Run button, because that will ignore breakpoints. Then, click on the Debug button (yellow circle). You can enter several breakpoints at different places. Breakpoints are entered by doubleclicking on the left bar in the editor next to the appropriate line (see red circle). The idea behind a breakpoint, is that the code will stop running when it reaches the line which was marked with a breakpoint. To debug, we will need to set a breakpoint somewhere in the code where we think the problem starts at, possibly close to the line that thrown the exception. If you run it, it will throw an ArrayIndexOutOfBoundsException. The data which is observed is in following format: public static List targets = new ArrayList() ĭataManager class holds a set of methods to create a pre-define type of an object.Įxample: public static final void createTarget(String id, double x, double y, double z) Additionally, the class follows an observer and factory patterns. I got a class ( DataManager) that follows a singleton pattern. Upon completion, the user confirms creation by a click of a JButton. I got a set of forms, each form assists the user to create a pre-defined type of object. ![]()
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