Re: using TreeMap how to return the Object ?
On 06/27/2013 11:19 AM, Jeff Higgins wrote:
On 06/27/2013 01:30 AM, moonhkt wrote:
public void process_hosts () {
File ihost = new File(ifn);
String delimscfg = "\\s+"; /** multi-space */
String aline ;
int i = 0 ;
try {
BufferedReader br1 = new BufferedReader(new FileReader(ihost));
while ((aline = br1.readLine()) != null) {
String [] tokens = aline.split(delimscfg);
try {
if ( ! tokens[0].trim().startsWith("#")) {
/* System.out.print("-->");
System.out.print(tokens[0].trim());
System.out.print(" ");
System.out.print(tokens[0].trim().substring(0));
System.out.println("<--"); */
You'll want a (probably immutable) java.util.Comparable key,
or a java.util.Comparator for your key in a java.util.SortedMap.
Why store your key with your value?
ipx.put(tokens[0].trim(),new
eleHost(tokens[1].trim(),"x"));
}
} catch (ArrayIndexOutOfBoundsException e) {
continue;
}
}
} catch (IOException e) {
System.out.println(e);
}
}
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.util.Arrays;
import sun.net.util.IPAddressUtil;
/**
* <p>This class represents an Internet Protocol Version 6 (IPv6)
address.</p>
* <p>An instance of an IPv6Address consists of an raw IPv6 address
* (a sixteen element byte array) and has no knowledge of the internal
* (IPv6) structure of the raw IPv6 address.</p>
* <p>This class is intended to demonstrate concepts discussed in a
usenet posting.</p>
* <p><strong>FOR TESTING PURPOSES ONLY -- NOT FOR PRODUCTION
USE</strong></p>
* @author jeff
*
*/
public final class IPv6Address implements Comparable<IPv6Address> {
/**
* <p>Creates an IPv6Address based on the provided IPv6 raw address.</p>
* <p>If address is null, or other than sixteen bytes in length,
* the IPv6 unspecified address is returned.</p>
* <p>Possible to introduce an IPv6 mapped or compatible IPv4 address
here.</p>
*
* @param address a sixteen element byte array (raw IPv6 address)
* @return an IPv6Address object created from the raw IP address,
* or the IPv6 unspecified address if address is null or other than
sixteen bytes in length
*/
public static IPv6Address valueOf(byte[] address) {
return new IPv6Address(address);
}
/**
* <p>Creates an IPv6Address based on the provided IPv6 address
textual representation.</p>
* <p>If address is null, or otherwise invalid,
* the IPv6 unspecified address is returned.</p>
* <p>IPv6 mapped or compatible IPv4 address are considered invalid
here.</p>
*
* @param text representation of an IPv6 address
* @return an IPv6Address object created from the IPv6 address text,
* or the IPv6 unspecified address if address is null or invalid per
* sun.net.util.IPAddressUtil.textToNumericFormatV6(address)
*/
public static IPv6Address valueOf(String address) {
return new IPv6Address(address);
}
/**
* The IPv6 raw address stored by this class is in network byte order,
* the MSB is at index 0 and the LSB is at index 15.</p>
*
* @see java.lang.Comparable#compareTo(java.lang.Object)
*/
@Override
public int compareTo(IPv6Address address) {
int comparison = 0;
for (int i = 0; i < bytes.length; i++) {
comparison = Byte.compare(bytes[i], address.bytes[i]);
if (comparison != 0)
break;
}
return comparison;
}
/*
* (non-Javadoc)
*
* IDE generated equals method
*
* @see java.lang.Object#equals(java.lang.Object)
*/
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
IPv6Address other = (IPv6Address) obj;
if (!Arrays.equals(bytes, other.bytes))
return false;
return true;
}
/*
* (non-Javadoc)
*
* IDE generated hashCode method
*
* @see java.lang.Object#hashCode()
*/
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + Arrays.hashCode(bytes);
return result;
}
/**
* <p>Converts this IP address to a String. The string returned
* is of the IPv6 "preferred" form:</p>
* <p>RFC2373 Section 2.2 Text Representation of Addresses
* <p>1. The preferred form is x:x:x:x:x:x:x:x, where the 'x's are the
* hexadecimal values of the eight 16-bit pieces of the address.
* <br>Examples:</p>
* <pre>
FEDC:BA98:7654:3210:FEDC:BA98:7654:3210
1080:0:0:0:8:800:200C:417A
* </pre>
*
* @return a string representation of this IP address
* @see java.lang.Object#toString()
*/
@Override
public String toString() {
StringBuilder builder = new StringBuilder();
CharBuffer buffer = ByteBuffer.wrap(bytes).asCharBuffer();
while (buffer.hasRemaining()) {
builder.append(Integer.toHexString(buffer.get()));
if (buffer.hasRemaining())
builder.append(":");
}
return builder.toString();
}
private final byte[] bytes;
private IPv6Address(byte[] address) {
bytes = new byte[16];
if (address != null && address.length == 16)
System.arraycopy(address, 0, bytes, 0, 16);
}
private IPv6Address(String address) {
@SuppressWarnings("restriction")
byte[] test = IPAddressUtil.textToNumericFormatV6(address);
bytes = new byte[16];
if (test != null && test.length == 16) {
System.arraycopy(test, 0, bytes, 0, 16);
}
}
}