Applet not repainting

Question

Here is the problem. I call the Histogram class in my applet paint method and it painted what was in my Histogram class just fine. But now that I have added a few things to get the MouseListener to work so I can click on some of the graphics, my graphics just flash up really quick and then disappear. Here is my MyApplet2 paint method code and my Histogram class.
public void paint(Graphics g)
          System.out.println("We are in paint ");
          Dimension d = getSize();
          w = d.width;
          h = d.height;
          if(graph_type == "Histogram") {
               hist = new Histogram this,options,adata,bindata,g,w,h,group_array);
THESE WERE ADDED CAUSING THE PROBLEM//hist.addMouseListener(hist);
THESE WERE ADDED CAUSING THE PROBLEM//hist.setSize(w,h);
THESE WERE ADDED CAUSING THE PROBLEM//add(hist);
          validate();
          System.out.println("We are out of paint with a width of " + w + " and a     height of " + h);
import java.awt.*;
import java.text.*;
import java.awt.event.*;
class Histogram extends Panel implements MouseListener{
MyApplet2 applet;
Histogram(MyApplet2 parent,String[] options, String[][] data, int[][] bin, Graphics gc,int w, int h,String[] group_array) {
int color [][] = {{0,0,255},{255,255,128},{0,255,128},{0,128,255},{255,128,192},
{255,0,0},{255,255,0},{128,255,0},{0,255,255},{0,128,192},{128,128,192},{255,0,255},{128,64,64},
{255,128,64},{0,128,128},{128,128,255},{255,0,128},{128,0,0},{0,128,0},{0,0,160},{128,0,128},
{128,0,255},{0,64,0},{64,0,128},{0,0,0},{128,128,0},{128,128,128},{214,228,154},{185,255,185}};
applet = parent;
     System.out.println("We are in Histogram");
          int width = w-218;
          int height = h-23;
          int x_start = width/15;
          int y_start = height/20;
          int x_end = (width-2*(width/10));
          int y_end = (height-2*(height/15));
          int binwidth;
          int max = (int)Float.valueOf(options[4]).floatValue();
          int min = (int)Float.valueOf(options[3]).floatValue();
          binwidth = (x_end/bin[0].length);
//////////////////Drawing the background of the graph//////////////////////
          gc.setColor(Color.white);
          gc.fillRect(1,1,width,height);
          gc.setColor(Color.lightGray);
          gc.fillRect(x_start,y_start,binwidth*bin[0].length,y_end);
          gc.setColor(Color.black);
          gc.drawRect(x_start,y_start,binwidth*bin[0].length,y_end);
          gc.setColor(Color.black);
//////////////////Getting the size of the x-axis font//////////////////////
          int string_width;
          int x_font_size = 10,title_font_size = 12;
          Font f = new Font("SansSerif", Font.PLAIN, x_font_size);
          FontMetrics fm = gc.getFontMetrics(f);
          DecimalFormat df = new DecimalFormat("#######0.##");
          string_width = fm.stringWidth(String.valueOf(options[1]));
          while(string_width > binwidth && x_font_size != 0){
                    x_font_size--;
                    f = new Font("SansSerif", Font.PLAIN, x_font_size);
                    fm = gc.getFontMetrics(f);
                    string_width = fm.stringWidth(options[1]);
//////////////////Drawing the bars//////////////////////               
          for(int b = 0; b < bin.length; b++){
          draw_bin(gc,b,options,bin,x_start,y_start,x_end,y_end,binwidth,min,max,string_width,height,x_font_size,color);
     //////last x_axis_value/////
          gc.drawLine(binwidth*bin[0].length+x_start,y_start+y_end,binwidth*bin[0].length+x_start,(y_end+y_start+(height-(y_end+y_start))/4));
          string_width = fm.stringWidth(String.valueOf(Float.valueOf(options[1]).floatValue()));                                        
          gc.drawString(df.format((Float.valueOf(options[1]).floatValue())),((binwidth*bin[0].length)-(string_width/3))+x_start,(y_end+y_start+(height-(y_end+y_start))/2));
     //////graph title/////
          gc.setFont(new Font("SansSerif", Font.PLAIN, title_font_size));
          f = new Font("SansSerif", Font.PLAIN, title_font_size);
          fm = gc.getFontMetrics(f);
          gc.drawString("Histogram",(x_start+x_end)/2-fm.stringWidth("Histogram")/2,y_start/2);
          gc.drawString(options[6],(x_start+x_end)/2-fm.stringWidth(options[6])/2,y_start+y_end+(height-(y_start+y_end))/1);
     ////draw y_axis////
          draw_yaxis(gc,x_start,y_start,x_end,y_end,max,min,bin[0]);     
          draw_legend(gc,x_start,y_start,x_end,y_end,height,width,group_array,color);     
          addMouseListener(this);
          System.out.println("hello");
          //addActionListener(this);
          //validate();
          System.out.println("We are out of Histogram ");
public void mouseClicked(MouseEvent e) {
     /*if(e.getClickCount() == 2){  
     System.out.println("X = "+ e.getX());
     System.out.println("X = "+ e.getX());
public void mouseEntered(MouseEvent e){}
public void mouseExited(MouseEvent e){}
public void mouseReleased(MouseEvent e){}
public void mousePressed(MouseEvent e){}
I've been stuck on this all day...

Answer 1

Here's a repost so that I can read the code.
public void paint(Graphics g)
System.out.println("We are in paint ");
Dimension d = getSize();
w = d.width;
h = d.height;
if(graph_type == "Histogram") {
hist = new Histogram(this,options,adata,bindata,g,w,h,group_array);
//THESE WERE ADDED CAUSING THE PROBLEM
hist.addMouseListener(hist);
hist.setSize(w,h);
add(hist);
validate();
System.out.println("We are out of paint with a width of " + w + " and a height of " + h);
import java.awt.*;
import java.text.*;
import java.awt.event.*;
class Histogram extends Panel implements MouseListener
MyApplet2 applet;
Histogram(MyApplet2 parent,String[] options, String[][] data, int[][] bin, Graphics gc,int w, int h,String[] group_array)
int color [][] = {
{0,0,255},{255,255,128},{0,255,128},{0,128,255},              {255,128,192},{255,0,0},{255,255,0},{128,255,0},
              {0,255,255},{0,128,192},{128,128,192},{255,0,255},
              {128,64,64},{255,128,64},{0,128,128},{128,128,255},
              {255,0,128},{128,0,0},{0,128,0},{0,0,160},{128,0,128},
              {128,0,255},{0,64,0},{64,0,128},{0,0,0},{128,128,0},
              {128,128,128},{214,228,154},{185,255,185}
applet = parent;
System.out.println("We are in Histogram");
int width = w-218;
int height = h-23;
int x_start = width/15;
int y_start = height/20;
int x_end = (width-2*(width/10));
int y_end = (height-2*(height/15));
int binwidth;
int max = (int)Float.valueOf(options[4]).floatValue();
int min = (int)Float.valueOf(options[3]).floatValue();
binwidth = (x_end/bin[0].length);
//////////////////Drawing the background of the graph//////////////////////
gc.setColor(Color.white);
gc.fillRect(1,1,width,height);
gc.setColor(Color.lightGray);
gc.fillRect(x_start,y_start,binwidth*bin[0].length,y_end);
gc.setColor(Color.black);
gc.drawRect(x_start,y_start,binwidth*bin[0].length,y_end);
gc.setColor(Color.black);
//////////////////Getting the size of the x-axis font//////////////////////
int string_width;
int x_font_size = 10,title_font_size = 12;
Font f = new Font("SansSerif", Font.PLAIN, x_font_size);
FontMetrics fm = gc.getFontMetrics(f);
DecimalFormat df = new DecimalFormat("#######0.##");
string_width = fm.stringWidth(String.valueOf(options[1]));
while(string_width > binwidth && x_font_size != 0){
x_font_size--;
f = new Font("SansSerif", Font.PLAIN, x_font_size);
fm = gc.getFontMetrics(f);
string_width = fm.stringWidth(options[1]);
//////////////////Drawing the bars//////////////////////               
for(int b = 0; b < bin.length; b++){
draw_bin(gc,b,options,bin,x_start,y_start,x_end,y_end,binwidth,min,max,string_width,height,x_font_size,color);
//////last x_axis_value/////
gc.drawLine(binwidth*bin[0].length+x_start,y_start+y_end,binwidth*bin[0].length+x_start,y_end+y_start+(height-(y_end+y_start))/4));
string_width = fm.stringWidth(String.valueOf(Float.valueOf(options[1]).floatValue()));
gc.drawString(df.format((Float.valueOf(options[1]).floatValue())),((binwidth*bin[0].length)-(string_width/3)),x_start,(y_end+y_start+(height-(y_end+y_start))/2));
//////graph title/////
gc.setFont(new Font("SansSerif", Font.PLAIN, title_font_size));
f = new Font("SansSerif", Font.PLAIN, title_font_size);
fm = gc.getFontMetrics(f);
gc.drawString("Histogram",(x_start+x_end)/2-fm.stringWidth("Histogram")/2,y_start/2);
gc.drawString(options[6],(x_start+x_end)/2-fm.stringWidth(options[6])/2,y_start+y_end+(height-(y_start+y_end))/1);
////draw y_axis////
draw_yaxis(gc,x_start,y_start,x_end,y_end,max,min,bin[0]);     
draw_legend(gc,x_start,y_start,x_end,y_end,height,width,group_array,color);     
addMouseListener(this);
System.out.println("hello");
//addActionListener(this);
//validate();
System.out.println("We are out of Histogram ");
public void mouseClicked(MouseEvent e)
/*if(e.getClickCount() == 2){  
System.out.println("X = "+ e.getX());
System.out.println("X = "+ e.getX());
public void mouseEntered(MouseEvent e){}
public void mouseExited(MouseEvent e){}
public void mouseReleased(MouseEvent e){}
public void mousePressed(MouseEvent e){}
}