Example usage for java.util List size

Introduction

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

Prototype

int size();

Source Link

Document

Returns the number of elements in this list.

Usage

From source file:Main.java

public static int getSize(List list) {
    return list == null ? 0 : list.size();
}

From source file:Main.java

public static <T> T tryToGet2ndElement(List<T> list) {
    int size = list.size();
    long id = 0;/*www  .ja v  a2  s.c o  m*/
    if (size < 2) {
        return list.get(0);
    } else {
        return list.get(1);
    }
}

From source file:Main.java

public static boolean isEmptyList(List<?> list) {
    return list == null || list.size() == 0;
}

From source file:Main.java

public static <T> T firstItem(List<T> list) {
    return list != null && list.size() > 0 ? list.get(0) : null;
}

From source file:Main.java

public static boolean emptyList(List<?> list) {
    return (null != list && list.size() <= 0);
}

From source file:Main.java

public static <E> boolean isSublistOf(List<E> bigger, List<E> smaller) {
    if (smaller.size() > bigger.size()) {
        return false;
    }/*from   w  ww .  j ava 2s .co  m*/
    for (int start = 0; start + smaller.size() <= bigger.size(); ++start) {
        List<E> sublist = bigger.subList(start, start + smaller.size());
        if (sublist.equals(bigger)) {
            return true;
        }
    }
    return false;
}

From source file:Main.java

public static long[] LongListtolongArray(List<Long> LongList) {
    int s = LongList.size();
    long[] ret = new long[s];
    for (int i = 0; i < s; i++) {
        ret[i] = LongList.get(i);//from www.jav  a 2s  .  c o  m
    }
    return ret;
}

From source file:Main.java

public static <T> List<T> subList(List<T> target, int size) {
    if (target.size() <= size) {
        return new ArrayList<T>(target);
    } else {//from w  w  w . j a v a  2s.c o  m
        return target.subList(0, size);
    }
}

From source file:Main.java

public static <T> List<T> head(List<T> list, int n) {
    if (n <= list.size()) {
        return list.subList(0, n);
    } else {/* w w w. j  a va2s.c  o  m*/
        return list;
    }
}

From source file:Main.java

public static <T> int getCount(List<T> list) {
    return list == null ? 0 : list.size();
}