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Jun 25th, 2009

problem with accessing code after method call

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I have a code that calls a method, but after this call, any code after it is not executed....here is the method call skeleton

java Syntax (Toggle Plain Text)
 
if(//some condition){
//some code
myMethod(//some variables);
//some code/*not executed*/
}
 
if(//some condition){
//some code
myMethod(//some variables);
//some code/*not executed*/
}

the calling is done well but the code stays in that method i.e code following the method call is not executed. I dont know if this maybe due to the method being called because there method does not return anything. below is a skeleton of the method

java Syntax (Toggle Plain Text)
public void myMethod(//some variables)
{
    //some code here, basically initializing buffer streams
	try
	{
	   //a new file output stream is created here
	}
 
	catch(IOException e ){
	}
 
	//some jpeg encoding code
 
	try 
	{ 
		// jpeg encoder and closing the file stream
	}
 
	catch (IOException e){
 
	}
}
public void myMethod(//some variables)
{
    //some code here, basically initializing buffer streams
	try
	{
	   //a new file output stream is created here
	}
		
	catch(IOException e ){
	}
	
	//some jpeg encoding code
		
	try 
	{ 
		// jpeg encoder and closing the file stream
	}
		
	catch (IOException e){
			
	}
}

I hope this can put my point across. Any help is highly appreciated

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joshmo

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Jun 25th, 2009

Re: problem with accessing code after method call

Click to Expand / Collapse Quote originally posted by joshmo ...

I have a code that calls a method, but after this call, any code after it is not executed....here is the method call skeleton
java Syntax (Toggle Plain Text)
 
if(//some condition){
//some code
myMethod(//some variables);
//some code/*not executed*/
}
if(//some condition){ //some code myMethod(//some variables); //some code/*not executed*/ }
the calling is done well but the code stays in that method i.e code following the method call is not executed. I dont know if this maybe due to the method being called because there method does not return anything. below is a skeleton of the method
java Syntax (Toggle Plain Text)
public void myMethod(//some variables)
{
    //some code here, basically initializing buffer streams
	try
	{
	   //a new file output stream is created here
	}
 
	catch(IOException e ){
	}
 
	//some jpeg encoding code
 
	try 
	{ 
		// jpeg encoder and closing the file stream
	}
 
	catch (IOException e){
 
	}
}
public void myMethod(//some variables) { //some code here, basically initializing buffer streams try { //a new file output stream is created here } catch(IOException e ){ } //some jpeg encoding code try { // jpeg encoder and closing the file stream } catch (IOException e){ } }
I hope this can put my point across. Any help is highly appreciated

You could have an infinite loop. You could never return from your function. You could have some uncaught exception that is crashing the program. You need to put in some debugging to see how far you make it. Breakpoints would be better, but since I can't put them here, I'll use System.out.println statements. See how far you get by what displays. Again, breakpoints are much faster, with nothing to remember to delete.

java Syntax (Toggle Plain Text)
public void myMethod(//some variables)
{
    //some code here, basically initializing buffer streams
 
	    System.out.println ("Before first  try");
 
	try
	{
	   //a new file output stream is created here
	    System.out.println ("In first try");
	}
 
	catch(IOException e ){
	    System.out.println ("In first catch");
	}
 
	//some jpeg encoding code
	    System.out.println ("Between first and second try/catch");
 
	try 
	{ 
		// jpeg encoder and closing the file stream
	    System.out.println ("In second try");
	}
 
	catch (IOException e){
	    System.out.println ("In second catch");
	}
 
        System.out.println ("Made it to end of myMethod");
}
public void myMethod(//some variables)
{
    //some code here, basically initializing buffer streams

	    System.out.println ("Before first  try");

	try
	{
	   //a new file output stream is created here
	    System.out.println ("In first try");
	}
		
	catch(IOException e ){
	    System.out.println ("In first catch");
	}
	
	//some jpeg encoding code
	    System.out.println ("Between first and second try/catch");
		
	try 
	{ 
		// jpeg encoder and closing the file stream
	    System.out.println ("In second try");
	}
		
	catch (IOException e){
	    System.out.println ("In second catch");
	}

        System.out.println ("Made it to end of myMethod");
}

VernonDozier

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Jun 26th, 2009

Re: problem with accessing code after method call

thanks..managed to debug the code. However, I have another problem with using class objects. I have 2 classes, which need objects if each other..however, I cant seem to find a way of making this work...below is an example, and some of the obvious ideas that cannot work.

java Syntax (Toggle Plain Text)
 
myClass2 class2 =new myClass2(class4);
//other instantiations 
myClass4 class4=new myClass2(class1, class2, class3);
myClass2 class2 =new myClass2(class4);
//other instantiations 
myClass4 class4=new myClass2(class1, class2, class3);

and

java Syntax (Toggle Plain Text)
//other instantiations 
myClass4 class4=new myClass2(class1, class2, class3)
myClass2 class2 =new myClass2(class4);
//other instantiations 
myClass4 class4=new myClass2(class1, class2, class3)
myClass2 class2 =new myClass2(class4);

Last edited by joshmo; Jun 26th, 2009 at 6:14 am.

joshmo

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Jun 26th, 2009

Re: problem with accessing code after method call

Click to Expand / Collapse Quote originally posted by joshmo ...

thanks..managed to debug the code. However, I have another problem with using class objects. I have 2 classes, which need objects if each other..however, I cant seem to find a way of making this work...below is an example, and some of the obvious ideas that cannot work.
java Syntax (Toggle Plain Text)
 
myClass2 class2 =new myClass2(class4);
//other instantiations 
myClass4 class4=new myClass2(class1, class2, class3);
myClass2 class2 =new myClass2(class4); //other instantiations myClass4 class4=new myClass2(class1, class2, class3);
and
java Syntax (Toggle Plain Text)
//other instantiations 
myClass4 class4=new myClass2(class1, class2, class3)
myClass2 class2 =new myClass2(class4);
//other instantiations myClass4 class4=new myClass2(class1, class2, class3) myClass2 class2 =new myClass2(class4);

You're right, that won't work.

JAVA Syntax (Toggle Plain Text)
myClass4 class4=new myClass2(class1, class2, class3)
myClass2 class2 =new myClass2(class4);
myClass4 class4=new myClass2(class1, class2, class3)
myClass2 class2 =new myClass2(class4);

class2 is created in line 2, so it doesn't exist yet in line 1, so you can't pass it in line 1. So don't pass it. You can set it later, after both objects exist:

JAVA Syntax (Toggle Plain Text)
myClass4 class4=new myClass2(class1, class3)
myClass2 class2 =new myClass2(class4);
class4.setclass2 (class2);
myClass4 class4=new myClass2(class1, class3)
myClass2 class2 =new myClass2(class4);
class4.setclass2 (class2);

VernonDozier

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Jun 26th, 2009

Re: problem with accessing code after method call

Click to Expand / Collapse Quote originally posted by VernonDozier ...

JAVA Syntax (Toggle Plain Text)
myClass4 class4=new myClass2(class1, class3)
myClass2 class2 =new myClass2(class4);
class4.setclass2 (class2);
myClass4 class4=new myClass2(class1, class3) myClass2 class2 =new myClass2(class4); class4.setclass2 (class2);

I dont get what you mean by

Java Syntax (Toggle Plain Text)
 class4.setclass2(class2)
 class4.setclass2(class2)

Is setclass a reserved method or something or is there something I didnt quite understand

joshmo

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Jun 26th, 2009

Re: problem with accessing code after method call

No, it is not a "reserved method". He means for you to create the method, so that after your Object is created, you can use that method to pass it to the other class. A small example:

Java Syntax (Toggle Plain Text)
public class ExampleClass{
     String myString;
     public void setString(String otherString){
          myString = otherString;
     }
}
public class ExampleClass{
     String myString;
     public void setString(String otherString){
          myString = otherString;
     }
}

BestJewSinceJC

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Jun 27th, 2009

Re: problem with accessing code after method call

thanks for the replies...got it working now

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