gistfile1.java

import java.util.*;

class Diamond6 {
    public static void main(String[] args) {
        List<String> grandchild1 = Arrays.asList("A-1", "A-2", "A-3");
        List<String> grandchild2 = Arrays.asList("B-1", "B-2", "B-3");
        List<String> grandchild3 = Arrays.asList("C-1", "C-2", "C-3");

        Map<Integer, List<String>> child1 = new HashMap<Integer, List<String>>();
        child1.put(1, grandchild1);
        child1.put(2, grandchild2);

        Map<Integer, List<String>> child2 = new HashMap<Integer, List<String>>();
        child2.put(3, grandchild3);

        Map<String, Map<Integer, List<String>>> data = new HashMap<String, Map<Integer, List<String>>>();
        data.put("Child1", child1);
        data.put("Child2", child2);

        System.out.println(data);
    }
}
import java.util.*;

class Diamond7 {
    public static void main(String[] args) {
        List<String> grandchild1 = Arrays.asList("A-1", "A-2", "A-3");
        List<String> grandchild2 = Arrays.asList("B-1", "B-2", "B-3");
        List<String> grandchild3 = Arrays.asList("C-1", "C-2", "C-3");

        Map<Integer, List<String>> child1 = new HashMap<>();
        child1.put(1, grandchild1);
        child1.put(2, grandchild2);

        Map<Integer, List<String>> child2 = new HashMap<>();
        child2.put(3, grandchild3);

        Map<String, Map<Integer, List<String>>> data = new HashMap<>();
        data.put("Child1", child1);
        data.put("Child2", child2);

        System.out.println(data);
    }
}
import java.io.*;

class FileCopy6 {
    public static void main(String[] args) throws Exception {
        BufferedInputStream  is = null;
        BufferedOutputStream os = null;
        try {
            is = new BufferedInputStream( new FileInputStream(new File("/tmp/hoge")));
            os = new BufferedOutputStream(new FileOutputStream(new File("/tmp/foo")));
            int length = 0;
            byte[] buffer = new byte[1024];
            while ((length = is.read(buffer)) >= 0) {
                System.out.write(buffer, 0, length);
                os.write(buffer, 0, length);
            }
        } finally {
            try { if (is != null) is.close(); } catch (IOException e) { /* ignored */ }
            try { if (os != null) os.close(); } catch (IOException e) { /* ignored */ }
        }
        System.out.println("Done.");
    }
}
import java.io.*;

class FileCopy7 {
    public static void main(String[] args) throws Exception {
        try (BufferedInputStream  is = new BufferedInputStream( new FileInputStream(new File("/tmp/hoge")));
             BufferedOutputStream os = new BufferedOutputStream(new FileOutputStream(new File("/tmp/foo")))) {
            int length = 0;
            byte[] buffer = new byte[1024];
            while ((length = is.read(buffer)) >= 0) {
                System.out.write(buffer, 0, length);
                os.write(buffer, 0, length);
            }
        }
        System.out.println("Done.");
    }
}