Files examples

winterbe · winterbe · commit fee263c24f18 · 2015-03-18T07:38:23.000+01:00
diff --git a/src/com/winterbe/java8/samples/misc/Files1.java b/src/com/winterbe/java8/samples/misc/Files1.java
@@ -0,0 +1,76 @@
+package com.winterbe.java8.samples.misc;
+
+import java.io.BufferedReader;
+import java.io.BufferedWriter;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.List;
+
+/**
+ * @author Benjamin Winterberg
+ */
+public class Files1 {
+
+    public static void main(String[] args) throws IOException {
+        testWalk();
+        testFind();
+        testList();
+        testLines();
+        testReader();
+        testWriter();
+        testReadWriteLines();
+    }
+
+    private static void testWriter() throws IOException {
+        try (BufferedWriter writer =
+                     Files.newBufferedWriter(Paths.get("res", "output.js"))) {
+            writer.write("print('Hello World');");
+        }
+    }
+
+    private static void testReader() throws IOException {
+        try (BufferedReader reader =
+                     Files.newBufferedReader(Paths.get("res", "nashorn1.js"))) {
+            System.out.println(reader.readLine());
+        }
+    }
+
+    private static void testWalk() throws IOException {
+        Path start = Paths.get("/Users/benny/Documents");
+        int maxDepth = 5;
+        long fileCount = Files
+                .walk(start, maxDepth)
+                .filter(path -> String.valueOf(path).endsWith("xls"))
+                .count();
+        System.out.format("XLS files found: %s", fileCount);
+    }
+
+    private static void testFind() throws IOException {
+        Path start = Paths.get("/Users/benny/Documents");
+        int maxDepth = 5;
+        Files.find(start, maxDepth, (path, attr) ->
+                String.valueOf(path).endsWith("xls"))
+                .sorted()
+                .forEach(System.out::println);
+    }
+
+    private static void testList() throws IOException {
+        Files.list(Paths.get("/usr"))
+                .sorted()
+                .forEach(System.out::println);
+    }
+
+    private static void testLines() throws IOException {
+        Files.lines(Paths.get("res", "nashorn1.js"))
+                .filter(line -> line.contains("print"))
+                .forEach(System.out::println);
+    }
+
+    private static void testReadWriteLines() throws IOException {
+        List<String> lines = Files.readAllLines(Paths.get("res", "nashorn1.js"));
+        lines.add("print('foobar');");
+        Files.write(Paths.get("res", "nashorn1-modified.js"), lines);
+    }
+}
diff --git a/src/com/winterbe/java8/samples/stream/Streams6.java b/src/com/winterbe/java8/samples/stream/Streams6.java
@@ -2,9 +2,6 @@
 
 import java.io.IOException;
 import java.math.BigDecimal;
-import java.nio.file.Files;
-import java.nio.file.Path;
-import java.nio.file.Paths;
 import java.util.Arrays;
 import java.util.stream.IntStream;
 import java.util.stream.Stream;
@@ -15,49 +12,10 @@
 public class Streams6 {
 
     public static void main(String[] args) throws IOException {
-//        test1();
-//        test2();
-//        test3();
-//        test4();
-//        test5();
-//        test6();
-//        test7();
-        test8();
-    }
-
-    private static void test8() throws IOException {
-        Path start = Paths.get("/Users/benny/Documents");
-        int maxDepth = 5;
-        long fileCount =
-            Files
-                .walk(start, maxDepth)
-                .filter(path -> String.valueOf(path).endsWith("xls"))
-                .count();
-        System.out.format("XLS files found: %s", fileCount);
-    }
-
-    private static void test7() throws IOException {
-        Path start = Paths.get("/Users/benny/Documents");
-        int maxDepth = 5;
-        Files
-            .find(start, maxDepth, (path, attr) ->
-                String.valueOf(path).endsWith("xls"))
-            .sorted()
-            .forEach(System.out::println);
-    }
-
-    private static void test6() throws IOException {
-        Files
-            .list(Paths.get("/usr"))
-            .sorted()
-            .forEach(System.out::println);
-    }
-
-    private static void test5() throws IOException {
-        Files
-            .lines(Paths.get("/foo", "bar"))
-            .filter(line -> line.startsWith("A"))
-            .forEach(System.out::println);
+        test1();
+        test2();
+        test3();
+        test4();
     }
 
     private static void test4() {
