Example usage for java.util Iterator hasNext

Introduction

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

Prototype

boolean hasNext();

Source Link

Document

Returns true if the iteration has more elements.

Usage

From source file:Main.java

/**
 * Get key value of map in String// w ww  . j  a  v  a 2 s.c o m
 * 
 * @version 1.0
 * @author pankajbharti
 */
@SuppressWarnings("rawtypes")
public static String getKeyValue(Map map) {
    StringBuilder str = new StringBuilder("");

    Set keySet = map.entrySet();

    Iterator itr = keySet.iterator();

    while (itr.hasNext()) {
        Map.Entry entry = (Map.Entry) itr.next();

        str.append(entry.getKey() + " : " + entry.getValue() + "\n" + "\t \t \t \t \t");
    }

    return str.toString();
}

From source file:Main.java

/**
 * Fold up a collection into a string./*from ww w.  j  a v a2s . co  m*/
 */
public static String join(Collection a_collection, String a_sDelimiter)
/*
---------------------------------------------------------------
d1      17-Oct-2006      Adam Bones      Created 
-----------------------------------------------------------------
 */
{
    StringBuffer buffer = new StringBuffer();
    Iterator it = a_collection.iterator();
    while (it.hasNext()) {
        buffer.append(it.next());
        if (it.hasNext()) {
            buffer.append(a_sDelimiter);
        }
    }
    return buffer.toString();
}

From source file:Main.java

/**
 * Get the first element of a an {@link Iterable} in iteration order, or null if empty.
 *
 * @param <T> the type//from   ww w. ja va 2 s  .  co  m
 * @param iterable the thing to get something from.
 * @return the first thing the iterator spits out. May
 */
public static <T> T first(@Nonnull final Iterable<? extends T> iterable) {
    final Iterator<? extends T> iterator = iterable.iterator();
    return (iterator.hasNext()) ? iterator.next() : null;
}

From source file:Main.java

private static String toString(Collection message) {
    Iterator it = message.iterator();
    if (!it.hasNext())
        return "[]";

    StringBuilder sb = new StringBuilder();
    sb.append('[');
    for (;;) {/*from  www  .  j  a  va  2s . co m*/
        Object e = it.next();
        sb.append(e);
        if (!it.hasNext())
            return sb.append(']').toString();
        sb.append(',').append('\n').append(' ');
    }
}

From source file:Main.java

private static List getMainProcessNames(List list) {
    ArrayList arraylist = new ArrayList();
    Iterator iterator = list.iterator();
    do {//from  ww w . j av  a2 s. c  o m
        if (!iterator.hasNext())
            break;
        String s = (String) iterator.next();
        int i = s.indexOf(":");
        if (i > 0)
            arraylist.add(s.substring(0, i));
    } while (true);
    return arraylist;
}

From source file:Main.java

public static Map<String, String> parse(JSONObject json, Map<String, String> out) throws JSONException {
    Iterator<String> keys = json.keys();
    while (keys.hasNext()) {
        String key = keys.next();
        String val = null;
        try {/*from  w  w w .java 2 s .c  om*/
            JSONObject value = json.getJSONObject(key);
            parse(value, out);
        } catch (Exception e) {
            val = json.getString(key);
        }

        if (val != null) {
            out.put(key, val);
        }
    }
    return out;
}

From source file:Main.java

public static <T> boolean doCompare(Collection<T> c1, Collection<T> c2) {

    if (c1 == null && c2 == null) {
        return true;
    }//  w  ww.j a  v a  2s  .c  om

    if (c1 == null || c2 == null) {
        return false;
    }

    if (c1.size() != c2.size()) {
        return false;
    }

    Iterator<T> it = c1.iterator();
    while (it.hasNext()) {
        if (!c2.contains(it.next())) {
            return false;
        }
    }

    return true;
}

From source file:Main.java

public static <T> T getAt(Collection<T> col, int index) {
    if (col instanceof List)
        return ((List<T>) col).get(index);
    int i;/* www.  j  a  v a  2  s. c  om*/
    Iterator<T> it;
    for (i = 0, it = col.iterator(); i < index && it.hasNext(); it.next())
        ;
    return it.hasNext() ? it.next() : null;
}

From source file:Main.java

static void appendJson(JSONObject json, JSONObject jsonToAppend) {
    if (jsonToAppend == null)
        return;//from  w ww  .j ava2s .co m

    try {
        Iterator<String> it = jsonToAppend.keys();
        while (it.hasNext()) {
            String key = it.next();
            json.put(key, jsonToAppend.get(key));
        }
    } catch (JSONException e) {
        e.printStackTrace();
    }
}

From source file:Main.java

/** Take key and value pairs from source and create map from value to key in target. */
public static <K, V> void reverse(Map<K, V> source, Map<V, K> target) {
    Iterator<K> i = source.keySet().iterator();
    while (i.hasNext()) {
        K key = i.next();/*w  w w .j  av a2s. co m*/
        V value = source.get(key);
        target.put(value, key);
    }
}