No. It&#39;s a compile time error. So you **must** get rid of it before running your class.

What I usually do is put a fake `if` statement in front of it. Something like:

    if(true)
        return;
    // unwanted code follows. no errors.
    i++;
    j++;

With this code, you will not get a `Unreachable statement` error. And you will get what you want.

    33. if (1==1) return;
    34. System.out.println(&quot;Hello world!&quot;);

It works in other languages too. But ByteCode without row 34.


It isn&#39;t possible to ignore this error since it is an error according to the [Java Language Specification](http://java.sun.com/docs/books/jls/second_edition/html/statements.doc.html#236365).

You might also want to look at this post: https://stackoverflow.com/questions/2141029/unreachable-code-error-vs-dead-code-warning-in-java-under-eclipse

If you want disable/enable certain piece of code many times trick from old C may help you:

    some_code();
    more_code();
    // */
    
    /*
    some_code();
    more_code();
    // */

Now you need only to write `/*` at the beginning

you have to fix that [unreachable code][1].

    public void display(){
      return; //move the return statement to appropriate place
      int i;
    }
    
    
compiler will not compile your source code.
you have to take care of your source code that every line is reachable to compiler.

[1]:http://en.wikipedia.org/wiki/Unreachable_code#Examples

I want to write a little function to generate samples from appropriate distributions, something like:

    makeSample &lt;- function(n,dist,params)
    values &lt;- makeSample(100,&quot;unif&quot;,list(min=0,max=10))
    values &lt;- makeSample(100,&quot;norm&quot;,list(mean=0,sd=1))

Most of the code works, but I&#39;m having problems figuring out how to pass the named parameters for each distribution.  For example:

    params &lt;- list(min=0, max=1)
    runif(n=100,min=0,max=1) # works
    do.call(runif,list(n=100,min=0,max=1)) # works
    do.call(runif,list(n=100,params)) # doesn&#39;t work

I&#39;m guessing I&#39;m missing a little wrapper function somewhere but can&#39;t figure it out.  

Thanks!


Passing list of named parameters to function?

I need to iterate over a List of objects, doing something only for the objects that have a boolean property set to true.  I&#39;m debating between this code

    foreach (RouteParameter parameter in parameters.Where(p =&gt; p.Condition))
    { //do something }

and this code

    foreach (RouteParameter parameter in parameters)
    { 
      if !parameter.Condition
        continue;
      //do something
    }

The first code is obviously cleaner, but I suspect it&#39;s going to loop over the list twice - once for the query and once for the foreach.  This won&#39;t be a huge list so I&#39;m not overly concerned about performance, but the idea of looping twice just *bugs* me.

Question: Is there a clean/pretty way to write this without looping twice?

LINQ + Foreach vs Foreach + If

Is it possible to somehow ignore this error? I find it much easier to just put `return` in front of the code I don&#39;t want to run than to comment it (when the comments overlap and behave badly)...

Is there a way to ignore the &#39;Unreachable statement&#39; error?

<p>Is it possible to somehow ignore this error? I find it much easier to just put <code>return</code> in front of the code I don't want to run than to comment it (when the comments overlap and behave badly)...</p>


I need to receive an HTTP Post Multipart which contains only 2 parameters:

- A JSON string
- A binary file

Which is the correct way to set the body? 
I&#39;m going to test the HTTP call using Chrome REST console, so I&#39;m wondering if the correct solution is to set a &quot;label&quot; key for the JSON parameter and the binary file.

On the server side I&#39;m using Resteasy 2.x, and I&#39;m going to read the Multipart body like this:

    @POST
    @Consumes(&quot;multipart/form-data&quot;)
    public String postWithPhoto(MultipartFormDataInput  multiPart) {
      Map &lt;String, List&lt;InputPart&gt;&gt; params = multiPart.getFormDataMap();
      String myJson = params.get(&quot;myJsonName&quot;).get(0).getBodyAsString();
      InputPart imagePart = params.get(&quot;photo&quot;).get(0);
      //do whatever I need to do with my json and my photo
    }

Is this the way to go? 
Is it correct to retrieve my JSON string using the key &quot;myJsonName&quot; that identify that particular content-disposition? 
Are there any other way to receive these 2 content in one HTTP multipart request?

Thanks in advance

REST - HTTP Post Multipart with JSON

The Java language documentation says:

&gt; If a primitive type or a string is defined as a constant and the value
&gt; is known at compile time, the compiler replaces the constant name
&gt; everywhere in the code with its value. This is called a compile-time
&gt; constant.

My understanding is if we have a piece of code:

    private final int x = 10;

Then, the compiler will replace every occurrence of `x` in the code with literal `10`.


----------


But suppose the constant is initialized at run-time:

    private final int x = getX(); // here getX() returns an integer value at run-time.

Will there be any performance drop (howsoever negligible it may be) compared to the compile-time constant?


----------


Another question is whether the below line of code:

    private int y = 10; // here y is not final

is treated in same way as compile-time constant by the compiler?


----------


Finally, what I understand from the answers are:

1. `final static` means compile-time constant
2. just `final` means it&#39;s a constant but is initialized at run-time
3. just `static` means initialized at run-time
4. without `final` is a variable and wouldn&#39;t be treated as constant.

Is my understanding correct?

Compile-time constants and variables

My switch-case statement works perfectly fine yesterday. But when I run the code earlier this morning eclipse gave me an error underlining the case statements in color red and says: case expressions must be constant expression, it is constant I don&#39;t know what happened. Here&#39;s my code below:

    public void onClick(View src)
        {
        	switch(src.getId()) {
        	case R.id.playbtn:
    			checkwificonnection();
    			break;
    			
        	case R.id.stopbtn:
        		Log.d(TAG, &quot;onClick: stopping srvice&quot;);
        		Playbutton.setImageResource(R.drawable.playbtn1);
        		Playbutton.setVisibility(0); //visible
    			Stopbutton.setVisibility(4); //invisible
    			stopService(new Intent(RakistaRadio.this,myservice.class));
    			clearstatusbar();
    			timer.cancel();
    			Title.setText(&quot; &quot;);
    			Artist.setText(&quot; &quot;);
    			break;
    			
        	case R.id.btnmenu:
        		openOptionsMenu();
        		break;
        	}
        }

All R.id.int are all underlined in red.

switch case statement error: case expressions must be constant expression

I want to call a method `confirmExit()` when the red close button of the title bar of a JFrame is clicked.

How can I capture that event?

I&#39;d also like to prevent the window from closing if the user chooses not to proceed.

How to capture a JFrame&#39;s close button click event?

There are a lot of questions with this topic, the same solution, but this doesn&#39;t work for me. I have a simple test with an encryption. The encryption/decryption itself works (as long as I handle this test with the byte array itself and not as Strings). The problem is that don&#39;t want to handle it as byte array but as String, but when I encode the byte array to string and back, the resulting byte array differs from the original byte array, so the decryption doesn&#39;t work anymore. I tried the following parameters in the corresponding string methods: UTF-8, UTF8, UTF-16, UTF8. None of them work. The resulting byte array differs from the original. Any ideas why this is so?

Encrypter:

    public class NewEncrypter
    {
        private String algorithm = &quot;DESede&quot;;
        private Key key = null;
        private Cipher cipher = null;
        
        public NewEncrypter() throws NoSuchAlgorithmException, NoSuchPaddingException
        {
        	 key = KeyGenerator.getInstance(algorithm).generateKey();
             cipher = Cipher.getInstance(algorithm);
        }
        
    	public byte[] encrypt(String input) throws Exception
    	{
    		cipher.init(Cipher.ENCRYPT_MODE, key);
    		byte[] inputBytes = input.getBytes(&quot;UTF-16&quot;);
    		
    		return cipher.doFinal(inputBytes);
    	}
    
    	public String decrypt(byte[] encryptionBytes) throws Exception
    	{
    		cipher.init(Cipher.DECRYPT_MODE, key);
    		byte[] recoveredBytes = cipher.doFinal(encryptionBytes);
    		String recovered = new String(recoveredBytes, &quot;UTF-16&quot;);
    		
    		return recovered;
    	}
    }

This is the test where I try it:

    public class NewEncrypterTest
    {
    	@Test
    	public void canEncryptAndDecrypt() throws Exception
    	{
    		String toEncrypt = &quot;FOOBAR&quot;;
    		
    		NewEncrypter encrypter = new NewEncrypter();
    		
    		byte[] encryptedByteArray = encrypter.encrypt(toEncrypt);
    		System.out.println(&quot;encryptedByteArray:&quot; + encryptedByteArray);
    	
    		String decoded = new String(encryptedByteArray, &quot;UTF-16&quot;);
    		System.out.println(&quot;decoded:&quot; + decoded);
    		
    		byte[] encoded = decoded.getBytes(&quot;UTF-16&quot;);
    		System.out.println(&quot;encoded:&quot; + encoded);
    		
    		String decryptedText = encrypter.decrypt(encoded); //Exception here
    		System.out.println(&quot;decryptedText:&quot; + decryptedText);
    		
    		assertEquals(toEncrypt, decryptedText);
    	}
    }

Content Type	Original Author	Original Content on Stackoverflow
Question	Martin Melka	View Question on Stackoverflow
Solution 1 - Java	Pablo Santa Cruz	View Answer on Stackoverflow
Solution 2 - Java	Dmitry Sokolyuk	View Answer on Stackoverflow
Solution 3 - Java	Dawood	View Answer on Stackoverflow
Solution 4 - Java	csharpfolk	View Answer on Stackoverflow
Solution 5 - Java	Balaswamy Vaddeman	View Answer on Stackoverflow

Is there a way to ignore the 'Unreachable statement' error?

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LINQ + Foreach vs Foreach + If

Passing list of named parameters to function?

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