Java “constant string too long” compile error. Only happens using Ant, not when using Eclipse

Question

I have a few really long strings in one class for initializing user information. When I compile in Eclipse, I don\'t get any errors or warnings, and the resulting .jar runs

Answer 1

I was able to resolve this issue in a similar way like Lukas Eder.

String testXML = "REALLY LONG STRING...............................";
       textXML += "SECOND PART OF REALLY LONG STRING..........";
       textXML += "THIRD PART OF REALLY LONG STRING............";

Just split it up and add it together;

Answer 2

Nothing of above worked for me. I have created one text file with name test.txt and read this text file using below code

String content = new String(Files.readAllBytes(Paths.get("test.txt")));

Answer 3

A workaround is to chunk your string using new String() (yikes) or StringBuilder, e.g.

String CONSTANT = new String("first chunk") 
                + new String("second chunk") + ... 
                + new String("...");

Or

String CONSTANT = new StringBuilder("first chunk")
                .append("second chunk")
                .append("...")
                .toString();

These can be viable options if you're producing this string e.g. from a code generator. The workaround documented in this answer where string literals are concatenated no longer works with Java 11

Answer 4

I found I could use the apache commons lang StringUtils.join( Object[] ) method to solve this.

public static final String CONSTANT = org.apache.commons.lang.StringUtils.join( new String[] {
  "This string is long", 
  "really long...", 
  "really, really LONG!!!" 
} );

Answer 5

You can try this,

public static final String CONSTANT = new StringBuilder("Your really long string").toString();