Example usage for java.util Arrays fill

Introduction

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

Prototype

public static void fill(Object[] a, Object val)

Source Link

Document

Assigns the specified Object reference to each element of the specified array of Objects.

Usage

From source file:Main.java

public static String[] fillArray(String str, int length) {
    String result[] = new String[length];
    Arrays.fill(result, str);
    return result;
}

From source file:Main.java

public static boolean[] is_prime_up_to_with_sieve(int num) {
    boolean[] prime = new boolean[num + 1];
    Arrays.fill(prime, true);
    prime[0] = false;/* w ww  . j av  a2 s.  c  o  m*/
    prime[1] = false;
    int num_sqrt = (int) Math.ceil(Math.sqrt(num));

    for (int i = 2; i <= num_sqrt; i++) {
        if (prime[i])
            for (int j = i * i; j <= num; j += i)
                prime[j] = false;
    }
    return prime;
}

From source file:Main.java

public static String repeat(String s, int n) {
    if (s.length() == 1) {
        byte[] bb = new byte[n];
        Arrays.fill(bb, s.getBytes()[0]);
        return new String(bb);
    } else {//  w w  w  .ja  v  a  2  s  .  c  o m
        StringBuilder ret = new StringBuilder();
        for (int i = 0; i < n; i++)
            ret.append(s);
        return ret.toString();
    }
}

From source file:Main.java

public static void orderRandom(int upto, int order[]) {

    Arrays.fill(order, -1);

    for (int i = 0; i < upto;) {
        int val = randomInt(upto);
        if (!intExists(order, val, upto)) {
            order[i] = val;
            i++;/*from w w  w  .j av a  2s .c  om*/
        }
    }

}

From source file:Main.java

public static String prependString(String str, int len) {
    try {/*from ww w. j av a 2s  . com*/
        char[] tmp = new char[len - str.length()];
        Arrays.fill(tmp, ' ');
        return new String(tmp) + str;
    } catch (Exception e) {
        e.printStackTrace();
    }
    return str;
}

From source file:Main.java

public static double[] sobelKernel(int length, int size) {
    if (size <= 0) {
        return null;
    }/*from  w  w w.j  av  a2s . c o m*/
    double[] sobelKernel = new double[length];
    Arrays.fill(sobelKernel, 0);
    for (int i = 1; i <= size; i++) {
        sobelKernel[length - i] = -i;
        sobelKernel[i] = i;
    }
    return sobelKernel;
}

From source file:Main.java

public static Class[] params(Class cls, int times) {
    Class[] classes = new Class[times];
    Arrays.fill(classes, cls);
    return classes;
}

From source file:Main.java

public static double[] triangleKernel(int length, int size) {
    if (size <= 0) {
        return null;
    }//from www .java 2s  .c o  m
    double[] triangleKernel = new double[length];
    Arrays.fill(triangleKernel, 0);
    triangleKernel[0] = 1;
    for (int i = 1; i <= size; i++) {
        triangleKernel[length - i] = 1 - (double) i / (double) size;
        triangleKernel[i] = 1 - (double) i / (double) size;
    }
    return triangleKernel;
}

From source file:Main.java

public static byte[] createZeroBytes(int length) {
    if (length <= 0)
        throw new IllegalArgumentException("length must be gt 0");

    byte[] bytes = new byte[length];
    Arrays.fill(bytes, (byte) 0);
    return bytes;
}

From source file:Main.java

static String toBase58(final byte[] in) {

    final int[] indexes = new int[128];

    Arrays.fill(indexes, -1);

    final char[] ab = "123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz".toCharArray();

    for (int k = 0; k < ab.length; ++k)
        indexes[ab[k]] = k;/*from  w w w . j ava  2 s. co m*/

    int zeroCounter = 0;

    while (zeroCounter < in.length && in[zeroCounter] == 0)
        ++zeroCounter;

    final byte[] cp = Arrays.copyOf(in, in.length);

    final char[] enc = new char[cp.length * 2];

    int resBegin = enc.length;
    int begin = zeroCounter;

    while (begin < cp.length) {

        int rem = 0;
        for (int j = begin; j < cp.length; ++j) {
            final int temp = ((int) cp[j] & 0xFF) + (256 * rem);
            cp[j] = (byte) (temp / 58);
            rem = temp % 58;
        }

        enc[--resBegin] = ab[(byte) rem];
        if (cp[begin] == 0)
            ++begin;
    }

    while (resBegin < enc.length && ab[0] == enc[resBegin])
        ++resBegin;

    while (--zeroCounter >= 0)
        enc[--resBegin] = ab[0];

    return new String(enc, resBegin, enc.length - resBegin);
}