source code “cetak luas dan isi persegi panjang” :

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class bangun(var panjang:Int, var lebar:Int){
/* constructor start */
def this(){
this(3,4);
}
def this(x:Int){
this(x,4);
}
[...]

source code “cetak luas segitiga” :

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class segitiga(var alas:Int, var tinggi:Int){
/* constructor start */
def this(){
this(3,4);
}
def this(x:Int){
this(x,4);
}
/* [...]

install netbeans 6.7 :

download netbeans 6.7 di http://download.netbeans.org/netbeans/6.7/rc2
tambah permission untuk eksekusi file sh hasil download tadi

user@computer:$ chmod +x $PATH_TO_DOWNLOAD/netbeans-6.7rc2-ml-linux.sh

kemudian jalankan file tersebut

user@computer:$ sh $PATH_TO_DOWNLOAD/netbeans-6.7rc2-ml-linux.sh

ikuti petunjuk instalasi netbeans 6.7
jika instalasi sukses akan tampil icon netbeans di desktop

install scala plugin di netbeans 6.7 :

download pluginnya di http://biznetnetworks.dl.sourceforge.net/project/erlybird/nb-scala/nb-scala%206.7v1/nb-scala-6.7v1.zip
kemudian extrak file nb-scala-6.7v1.zip
jalankan aplikasi netbeans 6.7 dengan double click icon [...]