有Kotlin的setReadOnly（）吗？

Question

Kotlin中的文件是否具有等效的Java函数<span>test, </span><span>test, </span><span>test, </span>？

Answer 1

Java和Kotlin可以互操作而不会出现问题（即you can call Java from Kotlin和vice versa），因此，通过包含以下内容，您仍然可以在任何Kotlin类中仅使用setReadOnly()函数分别对java.io.*或java.io.File的适当引用：

// Notice the Java reference in this Kotlin class
import java.io.*

object ExampleKotlinProgram {

@JvmStatic
fun main(args: Array<String>) {
    // Get your file (File is exposed through Java's java.io reference above)
    val file = File("C:\\your-file.txt")

    // Use the setReadOnly() call to check if it can be access or set to read only
    if (f.setReadOnly()) {
        // Indicate it could be set to read only
        println("File set as Read Only")
    } else {
        // Indicate it couldn't be set to read only
        println("File cannot be set as Read Only")
    }
}

}