hi lo calculator
Problem: When I click a number and then click enter (z button) it randomizes again every time a letter or number is clicked. So that way it is a different number everytime I click, so I can't guess the right number. For example if I click on 4 it will say higher, if I click on 5 it will say lower, so if I click 4 again it will say lower.I have tried moving my random statement and this does not help and when I use a while loop the button freezes on the number I click
//GUI Calculator Program
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
publicclass calcextends JFrameimplements ActionListener
{
private JTextField displayText =new JTextField(30);
private JButton[] button =new JButton[17];
private String[] keys ={"1","2","3","4",
"5","6","7","8",
"a","b","c","d",
"e","f","g","h","z"};
private String numStr1 ="";
private String numStr2 ="";
boolean done =false;
privatechar op;
privateboolean firstInput =true;
public calc()
{
setTitle("My Calculator");
setSize(230, 200);
Container pane = getContentPane();
pane.setLayout(null);
displayText.setSize(200, 30);
displayText.setLocation(10, 10);
pane.add(displayText);
int x, y;
x = 10;
y = 40;
for (int ind = 0; ind < 17; ind++)
{
button[ind] =new JButton(keys[ind]);
button[ind].addActionListener(this);
button[ind].setSize(50, 30);
button[ind].setLocation(x, y);
pane.add(button[ind]);
x = x + 50;
if((ind + 1) % 4 == 0)
{
x = 10;
y = y + 30;
}
}
this.addWindowListener(new WindowAdapter()
{
publicvoid windowClosing(WindowEvent e)
{
System.exit(0);
}
}
);
setVisible(true);
setDefaultCloseOperation(EXIT_ON_CLOSE);
}
publicvoid actionPerformed(ActionEvent e)
{
String resultStr;//Step 1
String str = String.valueOf(e.getActionCommand());//Steps 1 and 2
char ch = str.charAt(0);//Steps 1 and 3
switch (ch)//Step 4
{
case'1':case'2':case'3'://Step 4a
case'4':case'5':case'6':
case'7':case'8':case'a':case'b':case'c'://Step 4b
case'd':case'e':case'f':case'g':
if (firstInput)
{
//numStr1 = "";
numStr1 = numStr1 + ch;
}
break;
case'z':
resultStr = evaluate();
//Step 4c
//displayText.setText(resultStr);
if (resultStr =="1"){
displayText.setText("Correct");
done =true;
}
elseif (resultStr =="2"){
displayText.setText("Higher");
}
else{//(resultStr == "3"){
displayText.setText("Lower");
}
numStr1 = resultStr;
// numStr2 = "";
firstInput =false;
break;
}
}
private String evaluate()
{
int num;
boolean done;
num = (int) (Math.random() * 16);
// try
// {
int num1 = Integer.parseInt(numStr1);
// int num2 = Integer.parseInt(numStr2);
String result;
//booleandone = false;
if (num1 == num)
{
result ="1";
return result;
// done = true;
}
else
if (num1 < num){
result="2";
return result;
}
else{
result="3";
return result;
}
}
publicstaticvoid main(String[] args)
{
calc c =new calc();
}
}
