Example usage for java.util ArrayList listIterator

List of usage examples for java.util ArrayList listIterator

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Introduction

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

Prototype

public ListIterator<E> listIterator()

Source Link

Document

Returns a list iterator over the elements in this list (in proper sequence).

Usage

From source file:Main.java

public static void main(String[] args) {
    ArrayList<String> aList = new ArrayList<String>();

    aList.add("1");
    aList.add("2");
    aList.add("3");
    aList.add("4");
    aList.add("5");

    // Get an object of ListIterator using listIterator() method

    ListIterator listIterator = aList.listIterator();
    listIterator.next();/*  ww  w .  jav  a 2s.  c  o m*/
    listIterator.next();

    // remove element returned by last next method

    listIterator.remove();
    for (String str : aList) {
        System.out.println(str);
    }
}

From source file:IteratorDemo.java

public static void main(String args[]) {
    ArrayList<String> al = new ArrayList<String>();

    al.add("C");/*from w  w  w . j a  va  2  s .com*/
    al.add("A");
    al.add("E");
    al.add("B");
    al.add("D");
    al.add("F");

    Iterator<String> itr = al.iterator();
    while (itr.hasNext()) {
        String element = itr.next();
        System.out.print(element + " ");
    }

    ListIterator<String> litr = al.listIterator();
    while (litr.hasNext()) {
        String element = litr.next();
        litr.set(element + "+");
    }

    itr = al.iterator();
    while (itr.hasNext()) {
        String element = itr.next();
        System.out.print(element + " ");
    }

    while (litr.hasPrevious()) {
        String element = litr.previous();
        System.out.print(element + " ");
    }
}

From source file:MainClass.java

public static void main(String args[]) {
    ArrayList<String> al = new ArrayList<String>();

    al.add("C");//www .  jav  a2 s . c  o m
    al.add("A");
    al.add("E");
    al.add("B");
    al.add("D");
    al.add("F");

    System.out.print("Original contents of al: ");
    Iterator<String> itr = al.iterator();
    while (itr.hasNext()) {
        String element = itr.next();
        System.out.print(element + " ");
    }
    System.out.println();

    ListIterator<String> litr = al.listIterator();
    while (litr.hasNext()) {
        String element = litr.next();
        litr.set(element + "+");
    }

    // Now, display the list backwards.
    System.out.print("Modified list backwards: ");
    while (litr.hasPrevious()) {
        String element = litr.previous();
        System.out.print(element + " ");
    }
}

From source file:Main.java

public static void removeFromList(ArrayList<Integer> e, int dato) {
    for (Iterator<Integer> iter = e.listIterator(); iter.hasNext();) {
        int a = iter.next();
        if (a == dato) {
            iter.remove();//ww  w .  j av a 2  s . com
        }
    }
}

From source file:Main.java

/** Removes useless path components.  */
private static String canonicalize(String path) {
    String pattern = File.separator;
    if (pattern.equals("\\"))
        pattern = "\\\\";

    String[] splitted = path.split(pattern);
    ArrayList<String> pathSpec = new ArrayList<String>(splitted.length);
    for (int i = 0; i < splitted.length; i++)
        pathSpec.add(splitted[i]);/*from w  ww. j a v a2s . com*/
    // Warning: these steps must be performed in this exact order!
    // Step 1: Remove empty paths
    for (ListIterator<String> it = pathSpec.listIterator(); it.hasNext();) {
        String c = it.next();
        if (c.length() == 0 && it.previousIndex() > 0)
            it.remove();
    }
    // Step 2: Remove all occurrences of "."
    for (ListIterator<String> it = pathSpec.listIterator(); it.hasNext();) {
        String c = it.next();
        if (c.equals("."))
            it.remove();
    }
    // Step 3: Remove all occurrences of "foo/.."
    for (ListIterator<String> it = pathSpec.listIterator(); it.hasNext();) {
        String c = it.next();
        if (c.equals("..") && it.previousIndex() > 0) {
            if (it.previousIndex() == 1 && pathSpec.get(0).length() == 0) {
                // "/.." is replaced by "/"
                it.remove();
            } else if (!pathSpec.get(it.previousIndex() - 1).equals("..")) {
                it.remove();
                it.previous();
                it.remove();
            }
        }
    }
    return listToString(pathSpec);
}

From source file:net.iponweb.hadoop.streaming.parquet.TextRecordWriterWrapper.java

TextRecordWriterWrapper(ParquetRecordWriter<SimpleGroup> w, FileSystem fs, JobConf conf, String name,
        Progressable progress) throws IOException {

    realWriter = w;//  ww w.  j a  v a  2 s . c o m
    schema = GroupWriteSupport.getSchema(conf);
    factory = new SimpleGroupFactory(schema);

    recorder = new ArrayList<>();
    ArrayList<String[]> Paths = (ArrayList<String[]>) schema.getPaths();
    Iterator<String[]> pi = Paths.listIterator();

    String[] prevPath = {};

    short grpDepth = 0;
    while (pi.hasNext()) {

        String p[] = pi.next();

        // Find longest common path between prev_path and current
        ArrayList<String> commonPath = new ArrayList<String>();
        for (int n = 0; n < prevPath.length; n++) {
            if (n < p.length && p[n].equals(prevPath[n])) {
                commonPath.add(p[n]);
            } else
                break;
        }

        // If current element is not inside previous group, restore to the group of common path
        for (int n = commonPath.size(); n < prevPath.length - 1; n++) {
            recorder.add(new PathAction(PathAction.ActionType.GROUPEND));
            grpDepth--;
        }

        // If current element is not right after common path, create all required groups
        for (int n = commonPath.size(); n < p.length - 1; n++) {
            PathAction a = new PathAction(PathAction.ActionType.GROUPSTART);
            a.setName(p[n]);
            recorder.add(a);
            grpDepth++;
        }

        prevPath = p;

        PathAction a = new PathAction(PathAction.ActionType.FIELD);

        Type colType = schema.getType(p);

        a.setType(colType.asPrimitiveType().getPrimitiveTypeName());
        a.setRepetition(colType.getRepetition());
        a.setName(p[p.length - 1]);

        recorder.add(a);
    }

    // Close trailing groups
    while (grpDepth-- > 0)
        recorder.add(new PathAction(PathAction.ActionType.GROUPEND));
}

From source file:au.com.dektech.dektalk.MainActivity.java

private boolean havePermissions(ArrayList<String> permissions) {
    boolean allgranted = true;
    ListIterator<String> it = permissions.listIterator();
    while (it.hasNext()) {
        if (ActivityCompat.checkSelfPermission(this, it.next()) != PackageManager.PERMISSION_GRANTED) {
            allgranted = false;//from   w  ww.ja v a 2 s  .c o  m
        } else {
            // permission granted, remove it from permissions
            it.remove();
        }
    }
    return allgranted;
}

From source file:vteaexploration.plottools.panels.XYChartPanel.java

private double getMinimumOfData(ArrayList alVolumes, int x) {

    ListIterator litr = alVolumes.listIterator();

    //ArrayList<Number> al = new ArrayList<Number>();
    Number low = getMaximumOfData(alVolumes, x);

    while (litr.hasNext()) {
        try {//from   w w w .  jav a2s. c  om
            MicroObjectModel volume = (MicroObjectModel) litr.next();
            Number Corrected = processPosition(x, volume);
            if (Corrected.floatValue() < low.floatValue()) {
                low = Corrected;
            }
        } catch (NullPointerException e) {
        }
    }
    return low.longValue();
}

From source file:vteaexploration.plottools.panels.XYChartPanel.java

private double getMaximumOfData(ArrayList alVolumes, int x) {

    ListIterator litr = alVolumes.listIterator();

    //ArrayList<Number> al = new ArrayList<Number>();
    Number high = 0;// w  ww.jav  a 2 s.  c om

    while (litr.hasNext()) {
        try {
            MicroObjectModel volume = (MicroObjectModel) litr.next();
            Number Corrected = processPosition(x, volume);
            if (Corrected.floatValue() > high.floatValue()) {
                high = Corrected;
            }
        } catch (NullPointerException e) {
        }
    }
    return high.longValue();

}

From source file:vteaexploration.plottools.panels.XYChartPanel.java

private double getRangeofData(ArrayList alVolumes, int x) {

    ListIterator litr = alVolumes.listIterator();

    ArrayList<Number> al = new ArrayList<Number>();

    Number low = 0;/*from  w w w . j  a v  a 2 s.c  o  m*/
    Number high = 0;
    Number test;

    while (litr.hasNext()) {
        try {
            MicroObjectModel volume = (MicroObjectModel) litr.next();
            Number Corrected = processPosition(x, volume);
            al.add(Corrected);

            if (Corrected.floatValue() < low.floatValue()) {
                low = Corrected;
            }
            if (Corrected.floatValue() > high.floatValue()) {
                high = Corrected;
            }
        } catch (NullPointerException e) {
        }
    }

    return high.longValue() - low.longValue();

}