You need to start at the beginning to learn how to build a GUI app and use the different java classes. Here is a link to the tutorial. Find an interesting topic and read about it.
The Really Big...
Type: Posts; User: Norm
Re: How to capture signature using Canvas and save in png format?
You need to start at the beginning to learn how to build a GUI app and use the different java classes. Here is a link to the tutorial. Find an interesting topic and read about it.
The Really Big...
Re: How to capture signature using Canvas and save in png format?
Where did you get that code? What does it have to do with creating and saving an image to a disk file?
You are copying too much code that you do not understand into your program.
You are trying...
Re: How to capture signature using Canvas and save in png format?
Please copy and paste here the full text of the error message. Images are no good because you can not copy text from them to do a find for what is referred to in the error message.
To copy the...
Re: How to capture signature using Canvas and save in png format?
Please post the full text of the error message.
What is the method you posted supposed to do? The image already exists in the code in post#13
Re: How to capture signature using Canvas and save in png format?
When you get errors, you need to copy and paste here the full text of the error message.
Re: How to capture signature using Canvas and save in png format?
The first code you posted has code in it to write an image to a file. Copy the code from that program.
Re: How to capture signature using Canvas and save in png format?
Is that the variable named: image? That is where the image has been drawn.
Re: How to capture signature using Canvas and save in png format?
Write the image in the image variable to a file.
Re: How to capture signature using Canvas and save in png format?
Can make a small simple program that compiles, executes and shows the problem? The posted code has endcode and decode classes and other stuff that is not part of the problem.
Re: How to capture signature using Canvas and save in png format?
There are lots of code examples here on the forum. Do a search for paintComponent for example.
Also look at the tutorial:
http://docs.oracle.com/javase/tutorial/uiswing/painting/index.html
Re: How to capture signature using Canvas and save in png format?
You need to save the points used to draw the lines in some container like an arraylist so you can you use them when you want to save what was drawn on the jpanel.
Your method of drawing the image...
Re: How to capture signature using Canvas and save in png format?
copy the source to a new folder away from the other files and try compiling it.
Re: How to capture signature using Canvas and save in png format?
The code does not compile because of missing class definitions.
How does the code get what was written on the canvas so it can be written to a file?
Re: How to capture signature using Canvas and save in png format?
Where are you trying to write the image to a file?