J2ME深入了解绘图编程
【IT168 技术文档】J2ME没有J2SE的功能，下面的代码是一个Properti
import java.util.Vector;
public class Properties {
private static int INITIAL_SIZE = 10;
private String[] initProps;
private Vector keys;
private Vector vals;
public Properties() {
keys = new Vector(INITIAL_SIZE);
vals = new Vector(INITIAL_SIZE);
}
public Properties(String[] propertyStrings) {
initProps = propertyStrings;
}
private void convertInitPropsToVectors() {
int numberOfProps;
numberOfProps = initProps.length / 2;
keys = new Vector(numberOfProps + INITIAL_SIZE);
vals = new Vector(numberOfProps + INITIAL_SIZE);
for (int i = 0; i < initProps.length; i += 2) {
keys.addElement(initProps[i]);
vals.addElement(initProps[i + 1]);
}
// The initial properties are no longer needed.
initProps = null;
}
public synchronized void addProperty(String key,
String value) {
if (keys == null) {
convertInitPropsToVectors();
}
keys.addElement(key);
vals.addElement(value);
return;
}
public synchronized String setProperty(String key, String value) {
int idx;
String rv = null;
if (keys == null) {
convertInitPropsToVectors();
}
idx = keys.indexOf(key);
if (idx == -1) { // If I don't have this, add it and return null
keys.addElement(key);
vals.addElement(value);
} else { // Else replace it and return the old one.
rv = (String)vals.elementAt(idx);
vals.setElementAt(value, idx);
}
return rv;
}
public synchronized String setPropertyIgnoreCase(String key, String value) {
int idx = -1;
String rv = null;
if (keys == null) {
convertInitPropsToVectors();
}
for (int count = 0; count < keys.size(); count++) {
if (((String)keys.elementAt(count)).equalsIgnoreCase(key)) {
idx = count;
}
}
if (idx == -1) { // If I don't have this, add it and return null
keys.addElement(key);
vals.addElement(value);
} else { // Else replace it and return the old one.
rv = (String)vals.elementAt(idx);
vals.setElementAt(value, idx);
/*
* Also replace the key at idx in case there is change in case
* for the key
*/
keys.setElementAt(key, idx);
}
return rv;
}
public synchronized String setPropertyAt(int index, String value) {
String rv;
if (keys == null) {
convertInitPropsToVectors();
}
rv = (String)vals.elementAt(index);
vals.setElementAt(value, index);
return rv;
}
public String getProperty(String key) {
String rv = null;
if (key == null) {
throw new NullPointerException();
}
if (keys == null) {
for (int i = 0; i < initProps.length; i += 2) {
if (initProps[i].equals(key)) {
rv = initProps[i + 1];
break;
}
}
} else {
int idx = keys.indexOf(key);
if (idx > -1) {
rv = (String)vals.elementAt(idx);
}
}
return rv;
}
public String getPropertyIgnoreCase(String key) {
String rv = null;
if (key == null) {
throw new NullPointerException();
}
if (keys == null) {
for (int i = 0; i < initProps.length; i += 2) {
if (initProps[i].equalsIgnoreCase(key)) {
rv = initProps[i + 1];
break;
}
}
} else {
int idx = -1;
for (int count = 0; count < keys.size(); count++) {
if (((String)keys.elementAt(count)).equalsIgnoreCase(key)) {
idx = count;
}
}
if (idx > -1) {
rv = (String)vals.elementAt(idx);
}
}
return rv;
}
public String getValueAt(int index) {
if (keys == null) {
return initProps[(index * 2) + 1];
}
return (String)vals.elementAt(index);
}
public String getKeyAt(int index) {
if (keys == null) {
return initProps[index * 2];
}
return (String)keys.elementAt(index);
}
public int size() {
if (keys == null) {
return initProps.length / 2;
}
return keys.size();
}
public synchronized String removeProperty(String key) {
int idx;
String rv = null;
if (keys == null) {
convertInitPropsToVectors();
}
idx = keys.indexOf(key);
if (idx > -1) {
rv = (String)vals.elementAt(idx);
keys.removeElementAt(idx);
vals.removeElementAt(idx);
}
return rv;
}
public final static void main(String[] arg){
Properties sProperties = new Properties();
sProperties.addProperty("wuhua", "OK");
sProperties.addProperty("wuhua", "OK1");
sProperties.addProperty("wuhua", "OK2");
System.out.println(sProperties.getProperty("wuhua"));
System.out.println(sProperties.getPropertyIgnoreCase("wuhua"));
}
}
public class Properties {
private static int INITIAL_SIZE = 10;
private String[] initProps;
private Vector keys;
private Vector vals;
public Properties() {
keys = new Vector(INITIAL_SIZE);
vals = new Vector(INITIAL_SIZE);
}
public Properties(String[] propertyStrings) {
initProps = propertyStrings;
}
private void convertInitPropsToVectors() {
int numberOfProps;
numberOfProps = initProps.length / 2;
keys = new Vector(numberOfProps + INITIAL_SIZE);
vals = new Vector(numberOfProps + INITIAL_SIZE);
for (int i = 0; i < initProps.length; i += 2) {
keys.addElement(initProps[i]);
vals.addElement(initProps[i + 1]);
}
// The initial properties are no longer needed.
initProps = null;
}
public synchronized void addProperty(String key,
String value) {
if (keys == null) {
convertInitPropsToVectors();
}
keys.addElement(key);
vals.addElement(value);
return;
}
public synchronized String setProperty(String key, String value) {
int idx;
String rv = null;
if (keys == null) {
convertInitPropsToVectors();
}
idx = keys.indexOf(key);
if (idx == -1) { // If I don't have this, add it and return null
keys.addElement(key);
vals.addElement(value);
} else { // Else replace it and return the old one.
rv = (String)vals.elementAt(idx);
vals.setElementAt(value, idx);
}
return rv;
}
public synchronized String setPropertyIgnoreCase(String key, String value) {
int idx = -1;
String rv = null;
if (keys == null) {
convertInitPropsToVectors();
}
for (int count = 0; count < keys.size(); count++) {
if (((String)keys.elementAt(count)).equalsIgnoreCase(key)) {
idx = count;
}
}
if (idx == -1) { // If I don't have this, add it and return null
keys.addElement(key);
vals.addElement(value);
} else { // Else replace it and return the old one.
rv = (String)vals.elementAt(idx);
vals.setElementAt(value, idx);
/*
* Also replace the key at idx in case there is change in case
* for the key
*/
keys.setElementAt(key, idx);
}
return rv;
}
public synchronized String setPropertyAt(int index, String value) {
String rv;
if (keys == null) {
convertInitPropsToVectors();
}
rv = (String)vals.elementAt(index);
vals.setElementAt(value, index);
return rv;
}
public String getProperty(String key) {
String rv = null;
if (key == null) {
throw new NullPointerException();
}
if (keys == null) {
for (int i = 0; i < initProps.length; i += 2) {
if (initProps[i].equals(key)) {
rv = initProps[i + 1];
break;
}
}
} else {
int idx = keys.indexOf(key);
if (idx > -1) {
rv = (String)vals.elementAt(idx);
}
}
return rv;
}
public String getPropertyIgnoreCase(String key) {
String rv = null;
if (key == null) {
throw new NullPointerException();
}
if (keys == null) {
for (int i = 0; i < initProps.length; i += 2) {
if (initProps[i].equalsIgnoreCase(key)) {
rv = initProps[i + 1];
break;
}
}
} else {
int idx = -1;
for (int count = 0; count < keys.size(); count++) {
if (((String)keys.elementAt(count)).equalsIgnoreCase(key)) {
idx = count;
}
}
if (idx > -1) {
rv = (String)vals.elementAt(idx);
}
}
return rv;
}
public String getValueAt(int index) {
if (keys == null) {
return initProps[(index * 2) + 1];
}
return (String)vals.elementAt(index);
}
public String getKeyAt(int index) {
if (keys == null) {
return initProps[index * 2];
}
return (String)keys.elementAt(index);
}
public int size() {
if (keys == null) {
return initProps.length / 2;
}
return keys.size();
}
public synchronized String removeProperty(String key) {
int idx;
String rv = null;
if (keys == null) {
convertInitPropsToVectors();
}
idx = keys.indexOf(key);
if (idx > -1) {
rv = (String)vals.elementAt(idx);
keys.removeElementAt(idx);
vals.removeElementAt(idx);
}
return rv;
}
public final static void main(String[] arg){
Properties sProperties = new Properties();
sProperties.addProperty("wuhua", "OK");
sProperties.addProperty("wuhua", "OK1");
sProperties.addProperty("wuhua", "OK2");
System.out.println(sProperties.getProperty("wuhua"));
System.out.println(sProperties.getPropertyIgnoreCase("wuhua"));
}
}
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