A StringBuilder bug or not?

Question

My test program is:

public class Test { public static void main(String[] args) { char ch = 65270; StringBuilder sb = new StringBuilder(); sb.append(ch); sb.append(" -> "); sb.append(Integer.valueOf(ch)); System.out.println(sb.toString()); } }

Result is : 65270 <- ﻶ

I can not understand why ?

I expire result is : ? -> 65270

Actual result in terminal (use command "javac Test.java" and "java Test") : ? -> 65270

But in Eclipse console : 65270 <- ?

It looks like an Eclipse problem ?

I can not understand why it should do something different. What behavior would you expect? — Philipp
– Philipp, Commented Nov 23, 2014 at 6:48

Christian Hujer · Accepted Answer · 2014-11-23 07:49:36Z

The reason for your result is that the character 65270 is an Arabic ligature. Arabic is a script that is written from right to left. The Eclipse console therefore changes the direction from left-to-right to right-to-left. If you try a character from a script that is not a right-to-left script, results will be as expected. Try 0x5678 which is the old Chinese symbol for ton (weight), for example.

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