Name: vi73552 Date: 04/29/99


A very long series (~ infinite) of error messages arose when I
attempted to compile (javac) my Java file.
The messages were:
"at sun.tools.java.ClassDefinition.getInnerClass(ClassDefinition.java)
repeated many many times, and finally
"at sun.tools.java.Environment.resolveNames(Environment.java)"
"at sun.tools.javac.SourceClass.resolveTypeStructure(SourceField.java)"
"at sun.tools.java.ClassDeclaration.getClassDefinition(ClassDeclaration.java)"
"at sun.tools.javac.Main.compile(Main.java)"
"at sun.tools.javac.Main.main(Main.java)"
error: An error has occurred in the compiler;


I was attempting to compile a class that extended another class.
I had the wrong line in my file.
Instead of the correct:

public class xx extends yy {

I had the wrong:

public class xx extends xx {

(Note that both class names are the same.)

So this illegal recursion sent the compiler into a loop of errors.

There should be a check for this incorrect self-extension, so bad
typists such as myself don't have problems. Thanks.


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import java.applet.*;
import java.awt.*;
public class Scribble_6_3 extends Scribble_6_3 {


// Read in two color parameters and set the colore.


public void init() {



super.init();




Color foreground = getColorParameter("foreground");





Color background = getColorParameter("background");






if (foreground != null) this.setForeground(foreground);







if (background != null) this.setBackground(background);







}










// Read the specified parameter.








// Interpret it as a hexadecimal number = RRGGBB and convert it to a color.









protected Color getColorParameter(String name) {








String value = this.getParameter(name);








try { return new Color(Integer.parseInt(value, 16) );







}catch (Exception e){







return null;







}







}










// Return information for display in an "About" dialog box.
















public String getAppletinfo() {








return "Scribble v. 6.4. written by John Blair.";








}

















// Return information about the supported parameters.








// Web browsers and applet viewers should display this, and may also








// allow viewers to set the parameter values.
















public String[][] getParameterInfo() { return info; }

















// Here is the information that getParameterinfo() returns.








// It is an array of arrays of strings describing each parameter.








// Format: parameter name, parameter type, parameter description
















private String[][] info = {








{"foreground", "hexadecimal color value", "foreground color"},









{"background", "hexadecimal color value", "background color"}









};
}
(Review ID: 57596)
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