/**  * A simple debug class, implemented as a static class. Controls  * where debugging output goes as well as the level of debugging  * output. The lower the debug level, the fewer debug messages are  * printed.   *  *  *   * @author Waleed Kadous  * @version $Id: Debug.java,v 1.1.1.1 2002/06/28 07:36:16 waleed Exp $  */package tclass.util;   import java.io.*; import java.util.*; public class Debug {    static private int debugLevel = 0;     static private PrintStream debugOut = System.err;     /**      * Now some definition of typical error printing levels      *     */    public static final int EMERGENCY = 0;     public static final int IMPORTANT = 1;    public static final int INFORMATION = 2;     public static final int PROGRESS = 3;     public static final int FN_CALLS = 4;     public static final int FN_PARAMS = 5;     public static final int EVERYTHING = 20;     /**     * Set the maximum debug levels. Any <code>dp(dl, s)</code>      * method call will only print if it is less than or equal to this      * level. As a convention, debugLevel 0 should not print any     * extraneous messages.      *     * @param debugLvl New debug level.      */    public static void setDebugLevel(int debugLvl){	debugLevel = debugLvl;     }    /**      * Get the current debug level     *     * @return Current debug level.      */     public static int getDebugLevel(){	return debugLevel;     }    /**      *     * Sets the place where all the debug messages go.      *      * @param p The PrintStream used to print outputs to.      *     */    public static void setDebugOut(PrintStream p){	debugOut = p;     }        /**     *     * Gets the current debug output.      *     */    public static PrintStream getDebugOut(){	return debugOut;     }    /**     * Prints a debug message, depending on the value of debug     * level. If the given debug level is less than or equal to the     * current debug level, the message is printed.      * Convention: 0 means this should always be printed; as the     * number of level gets higher, means it should not be printed     * unless that level of detail is required.      *     * @param level The level of this debug message.      * @param str The string to be printed.           */         public static void dp(int level, String str){	if(level <= debugLevel)	    debugOut.println(new Date() + ": " + str);     }    /**     * An assertion-based error print. If the assertion is true, do nothing.      * If it is false, print it out (at the zero debug level). If      * If you want level-based assertion, then use the method below.      */     public static void myassert(boolean assertion, String str){	if(!assertion) dp(0, str);     }        /**     * An assertion-based error print. If the assertion is true, do nothing.      * If it is false, print it out at the debug level l.      */         public static void myassert(boolean assertion, int l, String str){	if(!assertion) dp(l, str);     }    public static void main(String args[]){	if(args.length < 1){	    System.out.println("Debug Level: " +			       Debug.getDebugLevel()); 	}	else {	    Debug.setDebugLevel(Integer.parseInt(args[0])); 	}	for(int i=0; i < 10; i++){	    Debug.dp(i, "This is a level " + i + " debug statement."); 	}	        }}