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diff chapter9/WithPrintWriter.scala @ 0:b316eec6fa7a draft default tip

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author Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
date Tue, 08 Jan 2013 16:41:46 +0900
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/chapter9/WithPrintWriter.scala	Tue Jan 08 16:41:46 2013 +0900
@@ -0,0 +1,21 @@
+import java.io.File
+import java.io.PrintWriter
+
+object WithPrintWriter {
+    def withPrintWriter(file: File, op: PrintWriter => Unit) {
+	val writer = new PrintWriter(file)
+	try {
+	    op(writer)
+	} finally {
+	    writer.close()
+	}
+    }
+    def main(args: Array[String]) {
+	withPrintWriter(
+	    new File("date.txt"),
+	    writer => writer.println(new java.util.Date)
+	)
+    }
+}
+
+