HISTOGRAM using applet in JAVA

import java.applet.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Scanner;
public class histogram extends Applet implements ActionListener{


 Button increase, decrease;             // These are two buttons
TextField enter;
String str;
private int uvwl=0,lvwl=0,ucnt=0,lcnt=0,other=0;

 public void init ()
  {
 setSize(1000,700);
  setLayout(new FlowLayout());
  increase = new Button("GO");
  increase.addActionListener(this);
    add(increase);
    enter=new TextField(11);
 
    add(enter);
    decrease = new Button("QUIT");
    decrease.addActionListener(this);
    add(decrease);
  }

 private static int CountUpperCasevwl(String str)
   {
    int count=0;
    for(int i=0;i<str.length();i++)
    {
    char ch=str.charAt(i);
    if(ch=='A'||ch=='E'||ch=='I'||ch=='O'||ch=='U')
    count++;
   
    }
    return count;
   }
 private static int CountlowerCasevwl(String str)
   {
    int count=0;
    for(int i=0;i<str.length();i++)
    {
    char ch=str.charAt(i);
    if(ch=='a'||ch=='e'||ch=='i'||ch=='o'||ch=='u')
    count++;
   
    }
    return count;
   }
 private static int CountUpperCasecnt(String str)
   {
    int count=0;
    for(int i=0;i<str.length();i++)
    {
    char ch=str.charAt(i);
    if(ch>='A'&&ch<='Z'&&ch!='A'&&ch!='E'&&ch!='I'&&ch!='O'&&ch!='U')
    count++;
   
    }
    return count;
   }
 private static int CountlowerCasecnt(String str)
   {
    int count=0;
    for(int i=0;i<str.length();i++)
    {
    char ch=str.charAt(i);
    if(ch>='a'&&ch<='z'&&ch!='a'&&ch!='e'&&ch!='i'&&ch!='o'&&ch!='u')
    count++;
   
    }
    return count;
   }


 
public void actionPerformed(ActionEvent a) {
// TODO Auto-generated method stub
if(a.getSource()==increase){
str=enter.getText();
uvwl=CountUpperCasevwl(str);
lvwl=CountUpperCasecnt(str);
ucnt=CountlowerCasevwl(str);
lcnt=CountlowerCasecnt(str);
             other=str.length()-uvwl-lvwl-ucnt-lcnt;
}
else if(a.getSource()==decrease)
{
System.exit(3);
}
repaint();

}
public void paint(Graphics g)
{

setBackground(Color.gray);
g.drawRect(300, 100, 500, 500);
g.setColor(Color.blue);
g.drawString("UVWL", 320, 590);
g.drawString("LVWL", 380, 590);
g.drawString("UCNT", 440, 590);
g.drawString("LCNT", 500, 590);
g.drawString("OTHER", 560, 590);
for(int i=0;i<10;i++)
{

String str = Integer.toString(i);
g.drawString(str,305,590-(20*i));
}


g.setColor(Color.red);
g.fillRect(320, 580-( 20*uvwl),30 , 20*uvwl);
g.fillRect(380, 580-(20*lvwl), 30, 20*lvwl);
g.fillRect(440, 580-(20*ucnt), 30, 20*ucnt);
g.fillRect(500, 580-(20*lcnt), 30, 20*lcnt);
g.fillRect(560, 580-(20*other), 30, 20*other);
}

}