Example usage for java.util TreeMap TreeMap

Introduction

In this page you can find the example usage for java.util TreeMap TreeMap.

Prototype

public TreeMap()

Source Link

Document

Constructs a new, empty tree map, using the natural ordering of its keys.

Usage

From source file:Main.java

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");

    System.out.println(treeMap.containsKey("1"));
}

From source file:Main.java

public static void main(String[] args) {
    TreeMap<Integer, String> db = new TreeMap<Integer, String>();
    db.put(1000, "1000");
    db.put(1011, "1011");
    db.put(1102, "1102");
    db.put(2023, "2023");
    db.put(2034, "2034");

    System.out.println("First key lower than 2034: " + db.lowerKey(2034));
}

From source file:Main.java

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");

    System.out.println(treeMap.containsValue("Three"));
}

From source file:Main.java

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();// w  ww  .  j a v a2  s. c  om
    System.out.println(treeMap.size());
}

From source file:Main.java

public static void main(String[] a) {

    TreeMap map = new TreeMap();
    map.put("key1", "value1");
    map.put("key2", "value2");
    map.put("key3", "value3");

    if (!map.isEmpty()) {
        Object last = map.lastKey();
        boolean first = true;
        do {/* www .  j av  a2s .  com*/
            if (!first) {
                System.out.print(", ");
            }
            System.out.print(last);
            last = map.headMap(last).lastKey();
            first = false;
        } while (last != map.firstKey());
        System.out.println();
    }
}

From source file:Main.java

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");

    Object obj = treeMap.remove("2");
    System.out.println(obj + " Removed from TreeMap");
}

From source file:Main.java

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.put("4", "Four");
    treeMap.put("5", "Five");

    System.out.println("Lowest key: " + treeMap.firstKey());
    System.out.println("Highest key: " + treeMap.lastKey());
}

From source file:MainClass.java

public static void main(String[] a) {

    TreeMap map = new TreeMap();
    map.put("key1", "value1");
    map.put("key2", "value2");
    map.put("key3", "value3");

    Map map2 = map.headMap("key2");
    System.out.println(map2);//from  ww w.  j av  a 2s .co  m
}

From source file:Main.java

public static void main(String[] args) {
    TreeMap<String, String> treeMap = new TreeMap<String, String>();
    System.out.println("Size of TreeMap : " + treeMap.size());

    treeMap.put("1", "One");
    treeMap.put("2", "Two");
    treeMap.put("3", "Three");

    System.out.println("Size of TreeMap after addition : " + treeMap.size());
    treeMap.remove("2");
    System.out.println("Size of TreeMap after removal : " + treeMap.size());

}

From source file:Main.java

public static void main(String[] args) {

    TreeMap<Integer, String> treemap = new TreeMap<Integer, String>();

    // populating tree map
    treemap.put(2, "two");
    treemap.put(1, "one");
    treemap.put(3, "three");
    treemap.put(6, "six");
    treemap.put(5, "from java2s.com");

    System.out.println("Checking first entry");
    System.out.println("First entry is: " + treemap.firstEntry());
}