FRid

I have been working on a mxj.fileout. I am really close but i'm up against a wall here. I get two errors about throwing and catching Io.Fileexceptions. (basic-java stuff, i know but i'm learning along the way here! (zero-java-exp) I have found a good place for info on this but i have been throwing and catching all evening/night now and i only seem to get more errors with each "solution" i try. It is hard to learn java while at the same time translate everything back to "max-syntax", the java-doc has been a great help but asks for some experience. My brain is overloading right now so in a last resort i would like to turn to you! A (hopefull) helping hand.

I stripped the faulty try/catch-code so compiling it results in only two errors. Can you point out how to use the try/catch-combo on the fileexceptions thrown by the [FileOutputStream] and the [fos.write]. I have been searching numerous forums and sites for examples and i've tried alot but as said before only result in more errors. If needed i could post a follow-up to show how i "try" and "catch" but my guess is this is so simple for a experienced java-dev this won't be necessary.

    private static final String[] INLET_ASSIST = new String[]{

    private static final String[] OUTLET_ASSIST = new String[]{

        declareInlets(new int[]{DataTypes.ALL});

        declareOutlets(new int[]{DataTypes.ALL});

        setInletAssist(INLET_ASSIST);

        setOutletAssist(OUTLET_ASSIST);

    byte[] b2 = new byte[list.length];

    FileOutputStream fos = new FileOutputStream("C:/Documents and Settings/namee/test.bat");

I have been working on a mxj.fileout. I am really close but i'm up against a wall here. I get two errors about throwing and catching Io.Fileexceptions. (basic-java stuff, i know but i'm learning along the way here! (zero-java-exp) I have found a good place for info on this but i have been throwing and catching all evening/night now and i only seem to get more errors with each "solution" i try. It is hard to learn java while at the same time translate everything back to "max-syntax", the java-doc has been a great help but asks for some experience. My brain is overloading right now so in a last resort i would like to turn to you! A (hopefull) helping hand. 

I stripped the faulty try/catch-code so compiling it results in only two errors. Can you point out how to use the try/catch-combo on the fileexceptions thrown by the [FileOutputStream] and the [fos.write]. I have been searching numerous forums and sites for examples and i've tried alot but as said before only result in more errors. If needed i could post a follow-up to show how i "try" and "catch" but my guess is this is so simple for a experienced java-dev this won't be necessary. 

import com.cycling74.max.*;
import java.io.*;
import java.io.FileOutputStream.*;
import java.io.IOException.*;
import java.io.FileNotFoundException.*;

	private int k = 0;
	private int y = 0;
	private int n = 0;

	private static final String[] INLET_ASSIST = new String[]{
		"inlet 1 help"
	};
	private static final String[] OUTLET_ASSIST = new String[]{
		"outlet 1 help"
	};

	public testu2(Atom[] args)
	{
		declareInlets(new int[]{DataTypes.ALL});
		declareOutlets(new int[]{DataTypes.ALL});

		setInletAssist(INLET_ASSIST);
		setOutletAssist(OUTLET_ASSIST);

	public void bang()
	{
	k+=1;
	post("bang!"+ +k );
	outlet(0, k);

	Atom tempAtom;
	byte[] b2 = new byte[list.length];

	FileOutputStream fos = new FileOutputStream("C:/Documents and Settings/namee/test.bat");

	for (int n=0;n
	{
	tempAtom = list[n];
	b2[n] = tempAtom.toByte();
	int y = b2[n];
	post(""+y+"");
	outlet(0,y);
	fos.write(b2);

fileout-finally-almost

So basically you're wondering how to use try/catch ?

I suggest looking into the official Java tutorial on 

. In particular you'd want to look into the essential trail which also covers Exceptions, look for that lesson 

That should be enough material to get your Exceptions and the means to catch them sorted out.

I suggest looking into the official Java tutorial on thejavatutorial.com. In particular you'd want to look into the essential trail which also covers Exceptions, look for that lesson here.

That should be enough material to get your Exceptions and the means to catch them sorted out.


Hi, yeah i've figured how to use them yesterday. Thanks for the link but that was the same page i had been staring at for a long time, eventually the staring worked though :). For some reason it kept giving me errors and i can't really tell why it works now. But i'm left with a new error which i don't understand. It says "inconvertible types found : byte[] required: byte" (this was with,    "fos.write((byte) b2);" on line 83) I thought this was used to copy arrays instead of individual bytes.

When i change it to byte it leaves me with two new errors;

-C:Program FilesCycling '74Max 5.0Cycling '74javaclassestestu2.java[ 83 ] '.class' expected

C:Program FilesCycling '74Max 5.0Cycling '74javaclassestestu2.java[ 83 ] ';' expected

Would you know what's up? I don't understand why all of a sudden it's giving me errors about classes and the use of ";"

    private String j = ("fileout is fucked");

    private String p = ("filewrite is fucked");

    } catch (java.io.FileNotFoundException FNFE ) {

    } catch (java.io.IOException FNFE ) {

Hi, yeah i've figured how to use them yesterday. Thanks for the link but that was the same page i had been staring at for a long time, eventually the staring worked though :). For some reason it kept giving me errors and i can't really tell why it works now. But i'm left with a new error which i don't understand. It says "inconvertible types found   : byte[] required: byte" (this was with,	"fos.write((byte) b2);" on line 83) I thought this was used to copy arrays instead of individual bytes.

-C:Program FilesCycling '74Max 5.0Cycling '74javaclassestestu2.java[ 83 ] '.class' expected
        fos.write(byte b2);
                       ^
C:Program FilesCycling '74Max 5.0Cycling '74javaclassestestu2.java[ 83 ] ';' expected
        fos.write(byte b2);

Thanks en nog een gelukkig nieuwjaar,
FRid

	private int k = 0;
	private int y = 0;
	private int n = 0;
	private String j = ("fileout is fucked");
	private String p = ("filewrite is fucked");
	private String fos = null;
	private String los = null;
	private boolean t = false;

	try {
	FileOutputStream fos = new FileOutputStream("C:/Documents and Settings/namee/test.bat");
	} catch (java.io.FileNotFoundException FNFE ) {
	post(""+j+"");
	}

	for (int n=0;n
	{
	tempAtom = list[n];
	b2[n] = tempAtom.toByte();
	int y = b2[n];
	post(""+y+"");
	outlet(0,y);

	if (t = true) {
	try {
	fos.write(byte b2);
	} catch (java.io.IOException FNFE ) {
	post(""+p+"");
	}
			}

Just a couple of things i saw in your code:

the t variable in your list method will always be true whether the FileOutputStream is created or not.

which is trying to cast a byte array to a byte -which can't be done.

but, in your code you have fos.write(byte b2);

although it's not causing a problem here, the line if (t = true)

And, you need to close the stream at some time once you've finished with it.

Do you really want to write raw bytes to file? if not there might be a better way.. but if yes:

//write to the stream
public void list(Atom[] list) {
   ...
   byte[] bytes = Atom.toByte(list);
   try {
      fos.write(bytes);
      post(Arrays.toString(bytes));
   }
   catch (IOException ioe) {
      //do something
   }
   …
   //close your stream now, or later if you're appending
}

Hi.
Just a couple of things i saw in your code:

you mention fos.write((byte) b2);
which is trying to cast a byte array to a byte -which can't be done.
but, in your code you have fos.write(byte b2);
-that should be fos.write(b2);

although it's not causing a problem here, the line if (t = true)
i think should be if (t == true)
or just if (t)

Thanks for the pointers. I have a feeling i'm close but after implementing your code i'm left with two new errors;

- C:Program FilesCycling '74Max 5.0Cycling '74javaclassestestu3.java[ 65 ] cannot find symbol

- C:Program FilesCycling '74Max 5.0Cycling '74javaclassestestu3.java[ 66 ] cannot find symbol

Sorry to be bothering you again with these noob-questions but the reason why i thought this would be a good first project was because of this link;

http://www.java2s.com/Tutorial/Java/0180__File/UseFileOutputStreamtowritethebytestoafile.htm

Hadn't thought it's looks were this deceptive but i wonder why the use of the fos.write/close in the link is ok and why mine isn't? (although i haven't seen it compile but i presume it will or is it really,really deceptive?:)

"Do you really want to write raw bytes to file? if not there might be a better way.. but if yes:"

Oh yeah, i like those mangled glitch jpeg's and what not. I had recently made a sketch in processing that did just this. Eat a jpg and spit it out twisted, i love it.

(Another (better) way? I'd love to hear about that.)

private String j = ("fileout is fucked");

private String p = ("filewrite is fucked");

    declareInlets(new int[]{DataTypes.ALL});

    declareOutlets(new int[]{DataTypes.ALL});

    FileOutputStream fos = new FileOutputStream("C:/Documents and Settings/ik/test.bat");

    byte[] bytes = Atom.toByte(list);

- C:Program FilesCycling '74Max 5.0Cycling '74javaclassestestu3.java[ 65 ] cannot find symbol
symbol  : method write(byte[])
location: class java.lang.String
        fos.write(bytes);
           ^
- C:Program FilesCycling '74Max 5.0Cycling '74javaclassestestu3.java[ 66 ] cannot find symbol
symbol  : method close()
location: class java.lang.String
        fos.close();

Sorry to be bothering you again with these noob-questions but the reason why i thought this would be a good first project was because of this link;
http://www.java2s.com/Tutorial/Java/0180__File/UseFileOutputStreamtowritethebytestoafile.htm

"Do you really want to write raw bytes to file? if not there might be a better way.. but if yes:" 

Oh yeah, i like those mangled glitch jpeg's and what not. I had recently made a sketch in processing that did just this. Eat a jpg and spit it out twisted, i love it. 

private int k = 0;
private int y = 0;
private int n = 0;
private String j = ("fileout is fucked");
private String p = ("filewrite is fucked");
private String fos = null;
private String los = null;
private boolean t = false;

	private static final String[] INLET_ASSIST = new String[]{
	"inlet 1 help"
	};
	private static final String[] OUTLET_ASSIST = new String[]{
	"outlet 1 help"
	};

	public testu3(Atom[] args)
	{
	declareInlets(new int[]{DataTypes.ALL});
	declareOutlets(new int[]{DataTypes.ALL});

	setInletAssist(INLET_ASSIST);
	setOutletAssist(OUTLET_ASSIST);

public void bang()
	{
	k+=1;
	post("bang!"+ +k );
	outlet(0, k);

	Atom tempAtom;
	try {
	FileOutputStream fos = new FileOutputStream("C:/Documents and Settings/ik/test.bat");
	} catch (java.io.FileNotFoundException FNFE ) {
	post(""+j+"");
	}

	try {
	fos.write(bytes);
	fos.close();
	} catch (IOException ioe ) {
	post(""+p+"");
		}
	}
}


i'm not at a computer with max or netbeans just now but i see a couple of problems in the code:

1. there is an instance variable fos declared as a String instead of a FileOutputStream.

2. in the list method, the first try block declares another fos which hides the instance variable. You create a FileOutputStream and assign it to this local fos. After the try block this fos is unreachable.

in the 2nd try block you are calling write() and close() on fos - this time the original String instance variable. This is what's giving you the errors.

so, a list method with fos as instance variable:

private FileOutputStream fos;
...
public void list(Atom[] list)
{
   byte[] bytes = Atom.toByte(list);

   try {
      fos = new FileOutputStream("C:/Documents and Settings/ik/test.bat");
      fos.write(bytes);
      fos.close();
   }
   catch (java.io.IOException ioe) {
      ioe.printStackTrace();
   }
}

OR if you don't need fos anywhere else in your code- as a local variable:

public void list(Atom[] list)
{
   byte[] bytes = Atom.toByte(list);

   try {
      FileOutputStream fos = new FileOutputStream("C:/Documents and Settings/ik/test.bat");
      fos.write(bytes);
      fos.close();
   }
   catch (java.io.IOException ioe) {
      ioe.printStackTrace();
   }
}

Hope i makes sense and that does what you need..

Hi
i'm not at a computer with max or netbeans just now but i see a couple of problems in the code:

in the 2nd try block you are calling write() and close() on fos - this time the original String instance variable. This is what's giving you the errors. 

so, a list method with fos as instance variable:  

Hope i makes sense and that does what you need..


Dude! I owe you! It works. I'm streamlining it for public-release right now so i can share this. Probably sounds corny but without your help i couldn't have done it. Thanks, i really appreciate it.

Dude! I owe you! It works. I'm streamlining it for public-release right now so i can share this. Probably sounds corny but without your help i couldn't have done it. Thanks, i really appreciate it.
FRid


Fileout finally! (Almost)