gaamisc.java

Java实现的遗传算法工具集：GA Playground

import java.applet.*;
import java.net.*;
import java.io.*;
import java.text.*;
import lundin.SymbolicMath.*;

/*
import jfd.exp.SymbolTable;
import jfd.exp.Node;
import jfd.exp.ExpressionParser;
*/


public class GaaMisc {
	
	public static GaaLog deb;
	public static DecimalFormat gaaFormat= new DecimalFormat("#.###");
	
	public static DecimalFormat f0 = new DecimalFormat("0");
	public static DecimalFormat f02 = new DecimalFormat("00");
	public static DecimalFormat f03 = new DecimalFormat("000");
	public static DecimalFormat f04 = new DecimalFormat("0000");
	public static DecimalFormat f05 = new DecimalFormat("00000");
	public static DecimalFormat f06 = new DecimalFormat("000000");

	
	public static DecimalFormat f1 = new DecimalFormat("0.0");
	public static DecimalFormat f2 = new DecimalFormat("0.00");
	public static DecimalFormat f3 = new DecimalFormat("0.000");
	public static DecimalFormat f4 = new DecimalFormat("0.0000");
	public static DecimalFormat f7 = new DecimalFormat("0.0000000");

	public static boolean debugOn;
	public static int debugMode;

	public GaaMisc() {
		
		debugOn = false;
		debugMode = 0;
	  deb = new GaaLog("Gaa Log Window");
		deb.hide();
    deb.showMsg("");
	  deb.reshape(50,40,540,380);
		deb.start();
		
	}
	
	
	
	public static boolean flip(double ref) {

		double rand = (double) Math.random();
		if (rand < ref)
			return true;
		else
			return false;

	}
	
	
  public static int compareDouble(double x1,double x2){
  int flag;

	  if (x1 < x2)
	     flag = -1;
	  else if (x1 > x2)
	     flag = 1;
	  else
	     flag = 0;
	     
    return flag;

  }
	
	
	public static double factorial(int n) {
		
		double result = 1;
		
		while (n > 1) {
			result *= n;
			--n;
		}
		
		return result;
		
	}
	
	
public static String largeNumberFormat (double dbl, int mode)  { 
   
	DecimalFormat num = new DecimalFormat();
	Double d = new Double(dbl);
	String txtScientific =  " " + d.doubleValue();
	String txtDecimal =  " " + num.format(d.doubleValue());
	
	if (mode == 1)
		return txtScientific;
	else
		return txtDecimal;
	
}
		
		
		
		
		
		
		
	public static String formatDouble(double num, int places) {
		
		String st = "", temp = "";
		int pos;
		
		try {
			temp = String.valueOf(num);
			pos = temp.indexOf('.');
			st = temp.substring(0,pos+places+1);
		}
		catch (Exception e) {
			st = temp;
			//deb.debug("GaaMisc formatDouble error: " + e.toString());	
		}
		
		return(st);
		
	}
	
	
	public static String getTextFromFile(URL fileURL) {

 	    DataInputStream inData;
      boolean eof = false;
      String line = "";
      String txt = "";
		  InputStream in;
		  
		  /*
		  try {
		  	fileURL = new URL("file:///G:/Java/Projects/Gaa/GaaHelp.txt");
		  }
		  catch(Exception eee) {
		  };
		  */
		  
		  try {
			  in = fileURL.openStream();
			  inData = new DataInputStream(in);
		  }
		  catch(IOException e) {
			  return("");
		  }

		  
      while ((!eof) && (line != null)) {	
  	     try {
  		      line = inData.readLine();
  		      if (line != null) {
  		      		txt = txt + line +"\n";
  		      }
         }
         catch(Exception e) {
         } 	
      } 
    
		  return txt;

  }
  
  
  public static double evalFormula(String formula, String params) {
  	
			Eval ev = new Eval();
			double ans = Double.NaN;
			
	    try{
     		ans = ev.eval(formula,params);
     	}
     	catch (Exception ex) {
     		ans = 1234.5678;
     		deb.debug("evalFormula error: "+ex.toString());
     	}
  	
  		return(ans);
  	
  }
			
/*			
public static double evalString(String formula) {
	
	double result = 8765.4321;

  SymbolTable table = new SymbolTable(true);
  try
  {
     Node n = ExpressionParser.parse(formula);
     if(n != null)
     		result = n.execute(table);
  }
  catch(Exception e)
  {
     result = -1234.5678;
  }
  
  return result;
  
}	

*/		
			

	public static double evalStringJel(String formula, double vars[]) {
		
	  	double d;
	
			d = JelProcs.calc(formula,vars);	
			return d;
		
	}

			
	public static void dbg(String txt) {
	
		try {
			GaaAction.deb.debug(txt);
		}
		catch (Exception e) {
		}
		
	}


	public static void dbg(String txt, boolean flag) {
	
		if (flag) {
			dbg(txt);
		}
		
	}


	public static void debug(String txt) {
		
		if (debugOn)
			System.out.println(txt);
		
	}
	
	public static void debug(String txt, int mode) {
		
		if (mode == 1)
			System.out.println(txt);
		else if (mode == 2)
			dbg(txt);
		else if (mode == 3) {
			System.out.println(txt);
			dbg(txt);
		}
			
	}

	public static boolean stringToBoolean(String txt) {
		
		String trues = "onOnONtrueTrueTRUEyesYesYes";	
		
		int index = trues.indexOf(txt);
		if (index == -1)
			return(false);
		else
			return(true);
			
	}
	
	public static String booleanToString(boolean flag) {
		
		if (flag)
			return("True");
		else
			return("False");
				
	}
	
	
	
}