Scala example source code file (try.scala)

This example Scala source code file (try.scala) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Scala tags/keywords

a, a, anyref, anyref, app, error, error, sekwencjaarray, sekwencjaarray, string, test

The Scala try.scala source code

object Test extends AnyRef with App {
  val x = 1;

  def try1 = {
    Console.print("1 + 1 = ");
    Console.println(1 + (
      try {
        x;
      } catch {
        case _: Error => 1;
      }
    ));
  }

  def try2 = {
    Console.print("1 + 1 = ");
    Console.println(
      (try { x } catch {
        case _: Error => 1;
      }) 
      +        
      (try { x } catch {
        case _: Error => 1;
      })
    );
  }

  var n = 0;

  def try3 = {
    Console.print("1 + 1 = ");
    val x = try { 1 } catch {
      case e: Error => 1;
    }
    this.n = try { 1 } catch {
      case e: Error => 1;
    }
    Console.println(x + n);
  }

  var instance: AnyRef = null;

  def try4 = {
    if (instance == null) {
      instance = try {
        "" //new String();
      } catch {
        case _ =>
          val cs = "aaa";
          if (cs.length() > 0) {
            "" //new String();
          } else {
            throw new Error("fatal error");
            null
          }
      }
    }
  }

  def try5 = try {
    Console.print("1 + 1 = ");
    try {
      if (true)
        error("exit");
      1+1;
      ()
    } catch {
      case _ =>
        Console.println("2");
        error("for good");
    }
    Console.println("a");
  } catch {
    case _ => ();
  }

  class A {
    private val result = {
      val y = try { x } catch {
          case _: Error => 1;
        };
      x + y
    }
    Console.print("1 + 1 = ");
    Console.println(result);
  }

  // ticket #981
  def try6 {
   class SekwencjaArray {
    def get = null
   }

   var sekw : SekwencjaArray =
     try {
       null
     } catch {
       case _ => null
     }

    new AnyRef {
      def getValueAt(row:Int, col:Int) = sekw.get
    }
  }

/*
  def finally1 = {
    Console.print("1 + 1 = ");
    Console.println(1 + (
      try {
        x
      } finally {
        ()
      }
    ));
  }

*/
    
  try1;
  try2;
  try3;
  try4;
  try5;
  try6;
  Console.println;
  new A();
  ()
}