Android Studio - 非法字符 8204 错误

Question

由于某种原因，在重建我的项目后，我收到了一个非法字符错误，但我的代码中没有任何内容带有红色下划线。谁能告诉我哪里出了问题以及如何解决？

错误

illegal character: \8204

WCBankActivity.java

import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.app.ActionBarActivity;

public class WCBankActivity extends ActionBarActivity {

    public final static String EXTRA_MESSAGE = "Station_key";

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.fragment_wc_bank);

        if (savedInstanceState == null) {
            Intent intent = getIntent();
            String station = intent.getStringExtra(WCBankActivity.EXTRA_MESSAGE);

            FragmentWCBank newFragment = new FragmentWCBank();
            FragmentTransaction transaction = this.getSupportFragmentManager().beginTransaction();‌
            transaction.replace(R.id.detail_container, newFragment);
            transaction.commit();
        }
    }
}

Answer 1

尝试改变你的编码，看图：

Answer 2

这是与 BOM（字节顺序标记）字符有关的问题。 Eclipse 不允许这个字符。

Just copy paste the same content to a Notepad++ editor,
it shows the "LS" with black background. Have deleted the "LS" content and 
have copy the same content from notepad++ to java file, it works fine.