Fills in with zero to get to the desired length; original array with be at the specified position. - Java Collection Framework

Java examples for Collection Framework:Array Length

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Description

Fills in with zero to get to the desired length; original array with be at the specified position.

Demo Code


//package com.java2s;

public class Main {
    public static void main(String[] argv) throws Exception {
        int n0 = 2;
        int pos = 2;
        double[] v = new double[] { 34.45, 35.45, 36.67, 37.78, 37.0000,
                37.1234, 67.2344, 68.34534, 69.87700 };
        System.out.println(java.util.Arrays.toString(padding(n0, pos, v)));
    }//w w  w.ja  va 2  s.com

    /**
     * Fills in with zero to get to the desired length;
     * original array with be at the specified position.
     *
     * @param n0  length of the new array.
     * @param pos position of the old array.
     */
    public static double[] padding(int n0, int pos, double[] v) {
        if ((v.length + pos > n0) || (pos < 0)) {
            throw new IllegalArgumentException(
                    "Array is to long for this : " + n0 + ", " + pos + ", "
                            + v.length);
        }
        double[] w = new double[n0];
        System.arraycopy(v, 0, w, pos, v.length);
        return (w);
    }

    /**
     * Fills in with zeroes to get to the specified length;
     * original array with be at the specified position
     *
     * @param n0  length of the new array.
     * @param pos position of the old array.
     */
    public static int[] padding(int n0, int pos, int[] v) {
        if ((v.length + pos > n0) || (pos < 0)) {
            throw new IllegalArgumentException(
                    "The array is too long for this : " + n0 + ", " + pos
                            + ", " + v.length);
        }
        int[] w = new int[n0];
        System.arraycopy(v, 0, w, pos, v.length);
        return (w);
    }

    /**
     * Returns a comma delimited string representing the value of the array.
     */
    public static String toString(double[] array) {

        StringBuffer buf = new StringBuffer(array.length);
        int i;
        for (i = 0; i < array.length - 1; i++) {
            buf.append(array[i]);
            buf.append(',');
        }
        buf.append(array[i]);
        return buf.toString();
    }

    /**
     * Returns a comma delimited string representing the value of the array.
     */
    public static String toString(double[][] array) {
        StringBuffer buf = new StringBuffer();
        for (int k = 0; k < array.length; k++) {
            buf.append(toString(array[k]));
            buf.append(System.getProperty("line.separator"));
        }
        return buf.toString();
    }

    /**
     * Returns a comma delimited string representing the value of the array.
     */
    public static String toString(int[] array) {
        StringBuffer buf = new StringBuffer(array.length);
        int i;
        for (i = 0; i < array.length - 1; i++) {
            buf.append(array[i]);
            buf.append(',');
        }
        buf.append(array[i]);
        return buf.toString();
    }

    /**
     * Returns a comma delimited string representing the value of the array.
     */
    public static String toString(int[][] array) {
        StringBuffer buf = new StringBuffer();
        for (int k = 0; k < array.length; k++) {
            buf.append(toString(array[k]));
            buf.append(System.getProperty("line.separator"));
        }
        return buf.toString();
    }
}

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