Identify active methods in java

**Maya Angelou** · 06-04-2010

Hello,
I am very new to java and I have a query regarding this. If my program encounters a division by zero stops and tells me he very precisely where the error occurred, not just the object and method, but all active methods that led to the error.
Here is what I get

Code:

Exception in thread "Hand" java.lang.ArithmeticException: / By zero
        Has CommoditiesMarket.updateOffer(CommoditiesMarket.Java:141)
        Has Store.sell(Store.Java:65)
        Has Firm.sell(Firm.Java:237)
        Did Household.purchase(Household.Java:62)
        Did Household.Spend(Household.Java:118)
        Has HouseholdsSector.Spend(HouseholdsSector.Java:81)
        Has Test.doPeriod(Test.Java:23)
        Has Test.hand(Test.Java:58)

Can you please explain me this error, or sort this error for me. Thanks in advance.

**Linux-Us** · 06-04-2010

Hello,
To catch the exception it must use the try / catch blocks. In your case:

Code:

try {
	int x = 100/0;
} wrestling (ArithmeticException e) {
	System.out.println("Error");
}

You have not used try and catch block in your code, please use this you will find the output accordingly. That is the result will make a difference when you are going to use the try and catch block in your program.

**HardWeaR** · 06-04-2010

Hello,
To summarize how in a method to retrieve the name (and possibly line) method (or all methods) active and leading to the execution of the current method. I've never done this, but it's possible you should look at the Javadoc and the Throwable class and StackTraceElement. I would not want to say stupid things but I think you can use the method:

Code:

public StackTraceElement[] getStackTrace()

I hope this will help you and you will find a way out of this.

**GlassFish** · 06-04-2010

Hello,
Take a look at the following example, this may help you.
Here is the code

Code:

private void printErr(Throwable t, String errTitle) {

    StackTraceElement[] stctrc = t.getStackTrace();
    StringBuffer msg = New StringBuffer(tgetClass().getSimpleName());
    msg.append(" : ");
    msg.append(stctrc[0].function toString() {
    [native code]
}());
    msg.append('\ N');
    msg.append("  --> ");
    msg.append(tgetMessage());
    System.err.println(msg.function toString() {
    [native code]
}());

    joptpn.showMessageDialog(null,
        errTitle + "\ N" + TgetClass().getSimpleName() + " : " + TgetMessage(),
        "Error" + TgetClass().getSimpleName(),
        joptpn.Error_message);
  }

**SoftWore** · 06-04-2010

Hello,
Otherwise from Java 5.0 can use directly the methods

Code:

getStackTrace()

Thread class

Code:

StackTraceElement[] stctrc = Thread.currentThread().getStackTrace();

But be careful because whatever the method used, the generation of the call stack is fairly expensive and must not be misused under penalty of stopping in your code. If you have any more queries regarding this topic then please let me know. Thanks in advance.