в 17:43, 31 мая 2010

2010-05-31T17:43:48Z

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2010-05-31T14:10:47Z

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== new TreeMap < K, V > () ==



<source lang="java">

/**
*Output:
D: 99.22
A: 3434.34
C: 1378.0
B: 123.22
E: -19.08
B"s new balance: 1123.22
*/
import java.util.Map;
import java.util.Set;
import java.util.TreeMap;
public class MainClass {
public static void main(String args[]) {
TreeMap<String, Double> tm = new TreeMap<String, Double>();
tm.put("A", new Double(3434.34));
tm.put("B", new Double(123.22));
tm.put("C", new Double(1378.00));
tm.put("D", new Double(99.22));
tm.put("E", new Double(-19.08));
Set<Map.Entry<String, Double>> set = tm.entrySet();
for (Map.Entry<String, Double> me : set) {
System.out.print(me.getKey() + ": ");
System.out.println(me.getValue());
}
System.out.println();
double balance = tm.get("B");
tm.put("B", balance + 1000);
System.out.println("B"s new balance: " + tm.get("B"));
}
}

</source>



== TreeMap: entrySet() ==



<source lang="java">

/**
*Output:
D: 99.22
A: 3434.34
C: 1378.0
B: 123.22
E: -19.08
B"s new balance: 1123.22
*/
import java.util.Map;
import java.util.Set;
import java.util.TreeMap;
public class MainClass {
public static void main(String args[]) {
TreeMap<String, Double> tm = new TreeMap<String, Double>();
tm.put("A", new Double(3434.34));
tm.put("B", new Double(123.22));
tm.put("C", new Double(1378.00));
tm.put("D", new Double(99.22));
tm.put("E", new Double(-19.08));
Set<Map.Entry<String, Double>> set = tm.entrySet();
for (Map.Entry<String, Double> me : set) {
System.out.print(me.getKey() + ": ");
System.out.println(me.getValue());
}
System.out.println();
double balance = tm.get("B");
tm.put("B", balance + 1000);
System.out.println("B"s new balance: " + tm.get("B"));
}
}

</source>



== TreeMap: firstKey() ==



<source lang="java">

/*
Output:
Virginia, New York, Massachusetts
* */
import java.util.TreeMap;
public class MainClass {
public static void main(String args[]) {
TreeMap map = new TreeMap();
map.put("Virginia", "Richmond");
map.put("Massachusetts", "Boston");
map.put("New York", "Albany");
map.put("Maryland", "Annapolis");
if (!map.isEmpty()) {
Object last = map.lastKey();
boolean first = true;
do {
if (!first) {
System.out.print(", ");
}
System.out.print(last);
last = map.headMap(last).lastKey();
first = false;
} while (last != map.firstKey());
System.out.println();
}
}
}

</source>



== TreeMap: get(K k) ==



<source lang="java">

/**
*Output:
D: 99.22
A: 3434.34
C: 1378.0
B: 123.22
E: -19.08
B"s new balance: 1123.22
*/
import java.util.Map;
import java.util.Set;
import java.util.TreeMap;
public class MainClass {
public static void main(String args[]) {
TreeMap<String, Double> tm = new TreeMap<String, Double>();
tm.put("A", new Double(3434.34));
tm.put("B", new Double(123.22));
tm.put("C", new Double(1378.00));
tm.put("D", new Double(99.22));
tm.put("E", new Double(-19.08));
Set<Map.Entry<String, Double>> set = tm.entrySet();
for (Map.Entry<String, Double> me : set) {
System.out.print(me.getKey() + ": ");
System.out.println(me.getValue());
}
System.out.println();
double balance = tm.get("B");
tm.put("B", balance + 1000);
System.out.println("B"s new balance: " + tm.get("B"));
}
}

</source>



== TreeMap: headMap(K toKey) ==



<source lang="java">

/*
Output:
Virginia, New York, Massachusetts
* */
import java.util.TreeMap;
public class MainClass {
public static void main(String args[]) {
TreeMap map = new TreeMap();
map.put("Virginia", "Richmond");
map.put("Massachusetts", "Boston");
map.put("New York", "Albany");
map.put("Maryland", "Annapolis");
if (!map.isEmpty()) {
Object last = map.lastKey();
boolean first = true;
do {
if (!first) {
System.out.print(", ");
}
System.out.print(last);
last = map.headMap(last).lastKey();
first = false;
} while (last != map.firstKey());
System.out.println();
}
}
}

</source>



== TreeMap: headMap(K toKey, boolean inclusive) ==



<source lang="java">

import java.util.TreeMap;
public class Main {
public static void main(String[] a) {
TreeMap<String,String> map = new TreeMap<String,String>();
map.put("key1", "value1");
map.put("key2", "value2");
map.put("key3", "value3");
if (!map.isEmpty()) {
String last = map.lastKey();
boolean first = true;
do {
if (!first) {
System.out.print(", ");
}
System.out.print(last);
last = map.headMap(last, true).lastKey();
first = false;
} while (last != map.firstKey());
System.out.println();
}
}
}

</source>



== TreeMap: higherKey(K key) ==



<source lang="java">

import java.util.TreeMap;
public class Main {
public static void main(String[] args) {
TreeMap<Integer, Product> db = new TreeMap<Integer, Product>();
db.put(1000, new Product("D", 350));
db.put(1011, new Product("p", 15.75));
db.put(1102, new Product("M", 8.50));
db.put(2023, new Product("A", 150));
db.put(2034, new Product("T", 9.99));
System.out.println(db.subMap(1000, 1999) + "\n");
System.out.println(db.tailMap(1011) + "\n");
System.out.println(db.headMap(2023));
System.out.println("First key higher than 2034: " + db.higherKey(2034));
System.out.println("First key lower than 2034: " + db.lowerKey(2034));
}
}
class Product {
String desc;
double price;
Product(String desc, double price) {
this.desc = desc;
this.price = price;
}
public String toString() {
return "Description=" + desc + ", Price=" + price;
}
}

</source>



== TreeMap: lastKey() ==



<source lang="java">

/*
Output:
Virginia, New York, Massachusetts
* */
import java.util.TreeMap;
public class MainClass {
public static void main(String args[]) {
TreeMap map = new TreeMap();
map.put("Virginia", "Richmond");
map.put("Massachusetts", "Boston");
map.put("New York", "Albany");
map.put("Maryland", "Annapolis");
if (!map.isEmpty()) {
Object last = map.lastKey();
boolean first = true;
do {
if (!first) {
System.out.print(", ");
}
System.out.print(last);
last = map.headMap(last).lastKey();
first = false;
} while (last != map.firstKey());
System.out.println();
}
}
}

</source>



== TreeMap: lowerKey(K key) ==



<source lang="java">

import java.util.TreeMap;
public class Main {
public static void main(String[] args) {
TreeMap<Integer, Product> db = new TreeMap<Integer, Product>();
db.put(1000, new Product("D", 350));
db.put(1011, new Product("p", 15.75));
db.put(1102, new Product("M", 8.50));
db.put(2023, new Product("A", 150));
db.put(2034, new Product("T", 9.99));
System.out.println(db.subMap(1000, 1999) + "\n");
System.out.println(db.tailMap(1011) + "\n");
System.out.println(db.headMap(2023));
System.out.println("First key higher than 2034: " + db.higherKey(2034));
System.out.println("First key lower than 2034: " + db.lowerKey(2034));
}
}
class Product {
String desc;
double price;
Product(String desc, double price) {
this.desc = desc;
this.price = price;
}
public String toString() {
return "Description=" + desc + ", Price=" + price;
}
}

</source>



== TreeMap: put(K k, V v) ==



<source lang="java">

/**
*Output:
D: 99.22
A: 3434.34
C: 1378.0
B: 123.22
E: -19.08
B"s new balance: 1123.22
*/
import java.util.Map;
import java.util.Set;
import java.util.TreeMap;
public class MainClass {
public static void main(String args[]) {
TreeMap<String, Double> tm = new TreeMap<String, Double>();
tm.put("A", new Double(3434.34));
tm.put("B", new Double(123.22));
tm.put("C", new Double(1378.00));
tm.put("D", new Double(99.22));
tm.put("E", new Double(-19.08));
Set<Map.Entry<String, Double>> set = tm.entrySet();
for (Map.Entry<String, Double> me : set) {
System.out.print(me.getKey() + ": ");
System.out.println(me.getValue());
}
System.out.println();
double balance = tm.get("B");
tm.put("B", balance + 1000);
System.out.println("B"s new balance: " + tm.get("B"));
}
}

</source>



== TreeMap: size() ==



<source lang="java">

import java.util.TreeMap;
public class Main {
public static void main(String[] args) {
TreeMap<String,String> treeMap = new TreeMap<String,String>();
treeMap.put("1", "One");
treeMap.put("2", "Two");
treeMap.put("3", "Three");
treeMap.clear();
System.out.println(treeMap.size());
}
}

</source>



== TreeMap: subMap(K fromKey, K toKey) ==



<source lang="java">

import java.util.TreeMap;
public class Main {
public static void main(String[] args) {
TreeMap<Integer, Product> db = new TreeMap<Integer, Product>();
db.put(1000, new Product("D", 350));
db.put(1011, new Product("p", 15.75));
db.put(1102, new Product("M", 8.50));
db.put(2023, new Product("A", 150));
db.put(2034, new Product("T", 9.99));
System.out.println(db.subMap(1000, 1999) + "\n");
System.out.println(db.tailMap(1011) + "\n");
System.out.println(db.headMap(2023));
System.out.println("First key higher than 2034: " + db.higherKey(2034));
System.out.println("First key lower than 2034: " + db.lowerKey(2034));
}
}
class Product {
String desc;
double price;
Product(String desc, double price) {
this.desc = desc;
this.price = price;
}
public String toString() {
return "Description=" + desc + ", Price=" + price;
}
}

</source>



== TreeMap: tailMap(T fromKey) ==



<source lang="java">

import java.util.TreeMap;
public class Main {
public static void main(String[] args) {
TreeMap<Integer, Product> db = new TreeMap<Integer, Product>();
db.put(1000, new Product("D", 350));
db.put(1011, new Product("p", 15.75));
db.put(1102, new Product("M", 8.50));
db.put(2023, new Product("A", 150));
db.put(2034, new Product("T", 9.99));
System.out.println(db.subMap(1000, 1999) + "\n");
System.out.println(db.tailMap(1011) + "\n");
System.out.println(db.headMap(2023));
System.out.println("First key higher than 2034: " + db.higherKey(2034));
System.out.println("First key lower than 2034: " + db.lowerKey(2034));
}
}
class Product {
String desc;
double price;
Product(String desc, double price) {
this.desc = desc;
this.price = price;
}
public String toString() {
return "Description=" + desc + ", Price=" + price;
}
}

</source>



== TreeMap: values() ==



<source lang="java">

import java.util.Collection;
import java.util.Iterator;
import java.util.TreeMap;
public class Main {
public static void main(String[] args) {
TreeMap<String, String> treeMap = new TreeMap<String,String>();
treeMap.put("1", "One");
treeMap.put("2", "Two");
treeMap.put("3", "Three");
Collection c = treeMap.values();
Iterator itr = c.iterator();
while (itr.hasNext()){
System.out.println(itr.next());
}
}
}

</source>

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Admin: 1 версия