基于Scala和Java方法的相互调用

object ScalaObjectDemo extends  App { 
    println("hello cc i miss you very much"); 
    def say(name:String){
        println(name)
    }
 
    /**
      * 先去调用java方法
      * @return
      */
    def say3(): Int ={
        println("这里是scala的方法了")
        var tmp=JavaDemo.say2("4");
        println(tmp);
        tmp
    }
}

public class JavaDemo {
    public static void main(String[] args) {
        ScalaObjectDemo.main(new String[]{}); 
        ScalaObjectDemo.say("cc ");
 
        //测试反复的方法调用
        int say3 = ScalaObjectDemo.say3();
        System.out.println(say3); 
    } 
 
    public static int say2(String age){
        System.out.println("这里是java的static 方法了"+age);
        return Integer.parseInt(age);
    }
}

class ScalaClassDemo { 
  def hi(name:String):Int={
    println(name)
    1
  }
}
 

int zhaojun = new ScalaClassDemo().hi("cc");
System.out.println(zhaojun);

public Map<String, String> getFieldTypeMap() {
    ...
}

val fieldTypeMap = someObject.getFieldTypeMap()
val innerSQL = fieldTypeMap.map { case (key: String, value: String) => key.replace(".", "_")}.toStream.sorted.reduce(_ + "," + _)

@Deprecated
import scala.collection.JavaConversions._

import scala.collection.JavaConverters.mapAsScalaMapConverter

val fieldTypeMap = someObject.getFieldTypeMap()
val innerSQL = fieldTypeMap.toScala.map { case (key: String, value: String) => key.replace(".", "_")}.toStream.sorted.reduce(_ + "," + _)