[Scala] java使用scala的jar包問題:Exception in thread "main" java.lang.ClassCastException: java.lang.Integer cannot be cast to java.lang.Short

場景

剛寫的scala處理bmp文件的實驗, 打了jar包讓java調用一下, 結果發生這個錯誤.

package org.tanglizi.bmp.demo;

import org.tanglizi.bmp.image.BmpImage;
import scala.Tuple3;

public class Application {

    public static void main(String[] args) {
        BmpImage image = BmpImage.create(200, 100);
        image = image.fill(new Tuple3<>(127, 0, 100));
        image.save("example.bmp");
    }
}

Exception in thread "main" java.lang.ClassCastException: java.lang.Integer cannot be cast to java.lang.Short
	at scala.runtime.BoxesRunTime.unboxToShort(BoxesRunTime.java:96)
	at org.tanglizi.bmp.image.BmpWriter$.$anonfun$toBytes$2(BmpWriter.scala:14)
	at scala.collection.immutable.List.foreach(List.scala:312)
	at org.tanglizi.bmp.image.BmpWriter$.$anonfun$toBytes$1(BmpWriter.scala:13)
	at org.tanglizi.bmp.image.BmpWriter$.$anonfun$toBytes$1$adapted(BmpWriter.scala:12)
	at scala.collection.immutable.List.foreach(List.scala:312)
	at org.tanglizi.bmp.image.BmpWriter$.toBytes(BmpWriter.scala:12)
	at org.tanglizi.bmp.image.BmpImage.save(BmpImage.scala:18)
	at org.tanglizi.bmp.image.BmpImage.save(BmpImage.scala:14)
	at org.tanglizi.bmp.demo.Application.main(Application.java:11)

Process finished with exit code 1

解決方法

范型問題, Tuple3<>應該為Tuple3<Short, Short, Short>
為了簡化代碼, 改為new Tuple3<>((short)127, ...)