Data update

Task/Table-creation-Postal-addresses/Java/table-creation-postal-addresses.java

@@ -0,0 +1,61 @@
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.nio.channels.FileChannel;
+import java.nio.file.Path;
+import java.nio.file.StandardOpenOption;
+
+public final class TableCreationPostalAddresses {
+
+	public static void main(String[] args) throws IOException {	
+		Address[] addresses = new Address[] {
+			new Address("FSF Inc.", "51 Franklin Street", "Boston", "MA", "02110-1301"),
+			new Address("The White House", "1600 Pennsylvania Avenue NW", "Washington", "DC", "20500"),
+			new Address("National Security Council", "1700 Pennsylvania Avenue NW", "Washington", "DC", "20500")
+		};
+		
+        Path path = Path.of("addresses.dat");
+		FileChannel fileChannel = FileChannel.open(path, StandardOpenOption.CREATE,
+														 StandardOpenOption.READ,
+														 StandardOpenOption.WRITE);			
+		for ( int i = 0; i < addresses.length; i++ ) {
+			byte[] data = addresses[i].addressRecord().getBytes();
+		    ByteBuffer writeBuffer = ByteBuffer.wrap(data);
+		    fileChannel.position(i * Address.RECORD_LENGTH);
+		    while ( writeBuffer.hasRemaining() ) {
+		        fileChannel.write(writeBuffer);
+		    }			
+		}
+		
+		for ( int i = 0; i < addresses.length; i++ ) {
+			fileChannel.position(i * Address.RECORD_LENGTH);
+			ByteBuffer readBuffer = ByteBuffer.allocate(Address.RECORD_LENGTH);
+			fileChannel.read(readBuffer);
+		    System.out.println( new String(readBuffer.array()) );			
+		}
+		
+		fileChannel.close();
+	}
+	
+}
+
+final class Address {
+	
+	public Address(String aName, String aStreet, String aCity, String aState, String aZipCode) {
+		name = aName; street = aStreet; city = aCity; state = aState; zipCode = aZipCode;
+	}
+	
+	public String addressRecord() {
+		String record = "";
+		record += String.format("%-30s", name);
+		record += String.format("%-30s", street);
+		record += String.format("%-15s", city);
+		record += String.format("%-5s", state);
+		record += String.format("%-10s", zipCode);
+		return record;		
+	}
+	
+	public static final int RECORD_LENGTH = 30 + 30 + 15 + 5 + 10;
+	
+	private String name, street, city, state, zipCode;
+	
+}