syntax_highlight.kt

// Kotlin
open class AAA {
    fun honey(){}
}
interface BBB {
    fun empire(){}
}

abstract class CCC {
    fun bleed() {}
}

// can distinguish class & abstract class
class D1: AAA {
    constructor(){}
}
class D2: CCC {
    constructor(){}
}

// can distinguish class & interface
class D3: AAA, BBB {
    constructor(){}
}

// can distinguish abstract class & interface
class D4: CCC, BBB {
    constructor(){}
}