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I already searched but which one is perfect ? like i have tried Proguard that keep static string values as it is. can you suggest me which one will help me ?
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Renu Meena wrote: can you suggest me which one will help me ?
Sorry, I have no idea which is best; you need to research the options and decide for yourself. But you may find that it is not worth the effort unless your code is really that important.
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Sorry to say but if you do not have solution then do not reply with invalid suggestions
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I gave you a perfectly valid suggestion. Whether you do something about it is entirely up to you. But please remember, you do not pay for this service, and we are all volunteers giving support free.
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Renu Meena wrote: I already searched but which one is perfect
If it runs on my computer I can always reverse engineer it.
If you want to protect your intellectual property then create a service not a product.
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Yeah. you are right but i am bind to provide product only because it is hardware related issue
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Hi I wrote a method for determining whether an integer is a palindrome like below. and for the input number -2147483648 I get true as it's output but in reality the output should be false. It seems the Collections.reverse(list) in my method doesn't work, I mean it doesn't reverse the input. I appreciate if someone can help my problem.
<pre> public boolean isPalindrome(int x) {
String raw=String.valueOf(x);
if(raw.charAt(0)=='-')
raw=raw.substring(1);
List<Character> list = new ArrayList<Character>();
for(char c:raw.toCharArray())
list.add(c);
List temp=list;
Collections.reverse(list);
return temp.equals(list);
}
modified 12-Mar-18 16:29pm.
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ElenaRez wrote: my method doesn't work.
Please explain exactly what that means.
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I mean if you test the program with the input number -2147483648 the result according to my method implementation will be true while in reality as you see the mentioned number is not palindrome and the result should be false. I can't understand what is the problem in my code.
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The problem is the following line in your code:
List temp = list;
which does not create a copy of the original, but just a new reference. So when list gets sorted, temp also points to the sorted elements.
To create a copy of the original you should replace the above line with the following:
List temp = new ArrayList<Character>();
temp.addAll(list);
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Thank you so much for your great answer. 
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Hello. I have written a code like below for Valid Parentheses problem. and after running it, I get error such: Exception in thread "main" java.lang.OutOfMemoryError: Java heap space in the line where I push in the stack. Could any one help what is the problem?
class Solution {
public boolean isValid(String s) {
Stack<Character> stack = new Stack<Character>();
int i=0;
boolean result=false;
if(s.length()==0||s==null) return true;
while(i<s.length()){
if(s.charAt(i)=='('||s.charAt(i)=='{'||s.charAt(i)=='[')
stack.push(s.charAt(i));
if((!stack.empty())&&(s.charAt(i)==')'||s.charAt(i)=='}'||s.charAt(i)==']')){
if(stack.peek()==s.charAt(i)){
stack.pop();
i++;
continue;
}
else
result=false;
}
}
if(stack.empty())
return true;
return result;
}
}
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I would guess that the two following if statements are not correct, so you are stuck in the while loop.
if((!stack.empty())&&(s.charAt(i)==')'||s.charAt(i)=='}'||s.charAt(i)==']')){
if(stack.peek()==s.charAt(i)){
So if you have just encountered an open bracket the first of these statements will be false, because i is still pointing to the open bracket in your string. The loop will just continue round examining the same character.
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Hi,
1. what Richard said.
2. Your code is far from correct, there is no reason whatsoever to look more than once at the same character, so index i should get incremented unconditionally, hence a for-loop or better yet a foreach-loop would be preferable.
3. You shouldn't be calling CharAt() over and over, do it once and store the result in currentCharacter
4. What closes a "{" isn't another "{", it is a "}"; an easy way to get this, is by having separate test-and-push combinations (if it is "{" then push "}").
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Elenora wrote: stack.push(s.charAt(i));
Only way that code can run out of memory is if that line is called way to many times.
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i made a form that select file and provide key i want to encrypt that file by aes encrytion in jsp
my form code is:=
<html>
<body bgcolor="#006699" text=#006699 >
<center>
<br>
<div style="width:95%;border-style:solid;border-width:3px;border-color:white;height:600px;border-radius:15px;background-color:white;box-shadow:-1px -1px 20px black" >
<img src=../images/titlebar.jpg width=100% style="border-radius:15px" >
<h1>Encrypt Document</h1>
<hr color=orange size=3px>
<form name=f1 method=post action=uploadfile.jsp enctype="multipart/form-data" >
<input type=hidden name=demo value=demo >
<table>
<tr><td>Select File</td><td><input type=file name=filename required size=60 ></td></tr>
<tr><td>Enter Key</td><td><input type=text name=title size=80 required ></td></tr>
<tr><td></td><td><input type=submit name=btnencript value=Encrypt onclick=dosubmit() ></td></tr>
</table>
<hr color=orange size=3px>
</form>
</div>
</center>
</body>
</html>
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Hey there,
I´m going to code breakout in java via the mvc pattern. And I have some problems with it.
Here´s my approach so far:
Model: coordinates of bricks, ball, panel and given coordinates by mouseListener
Controller: every physics, what happens with collisions, how to move the ball
View: every object that has to be drawn
But I´m not really cool with that because I´m not really confident about the implementation. And how do I put everything together to let the game run?
Grateful for any advice!
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Posting a single word is not a question.
At least your repost of this in QA[^] provided some details of the question.
"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer
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Does make for a fast read though.
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Hi i am a beginner user of Java and I want to make an weather Java program which use gui and the openweathermap api. Can anyone help me???
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1. Learn how to write a problem
2. Learn about sockets. Probably need to learn about http and Rest also (but I didn't look at the API.)
3. Learn about UI
4. Create a program that uses the weather API. This uses 1, 2
5. Create a program that displays the results. This uses 1, 2, 3, 4.
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