Java Array Join joiner(int[] ints, String split)

Description

joiner

License

Apache License

Declaration

public static String joiner(int[] ints, String split) 

Method Source Code

//package com.java2s;
//License from project: Apache License 

import java.util.*;

public class Main {
    private static final String EMPTY = "";
    private static final String NULL = "null";

    public static String joiner(int[] ints, String split) {

        if (ints.length == 0) {
            return EMPTY;
        }//from  w  w  w. java  2  s. c o m

        StringBuilder sb = new StringBuilder(String.valueOf(ints[0]));

        for (int i = 1; i < ints.length; i++) {
            sb.append(split);
            sb.append(ints[i]);
        }

        return sb.toString();
    }

    public static String joiner(double[] doubles, String split) {

        if (doubles.length == 0) {
            return EMPTY;
        }

        StringBuilder sb = new StringBuilder(String.valueOf(doubles[0]));

        for (int i = 1; i < doubles.length; i++) {
            sb.append(split);
            sb.append(doubles[i]);
        }

        return sb.toString();
    }

    public static String joiner(float[] floats, String split) {

        if (floats.length == 0) {
            return EMPTY;
        }

        StringBuilder sb = new StringBuilder(String.valueOf(floats[0]));

        for (int i = 1; i < floats.length; i++) {
            sb.append(split);
            sb.append(floats[i]);
        }

        return sb.toString();
    }

    public static String joiner(long[] longs, String split) {

        if (longs.length == 0) {
            return EMPTY;
        }

        StringBuilder sb = new StringBuilder(String.valueOf(longs[0]));

        for (int i = 1; i < longs.length; i++) {
            sb.append(split);
            sb.append(longs[i]);
        }

        return sb.toString();
    }

    public static String joiner(Collection<?> c, String split) {

        Iterator<?> iterator = c.iterator();

        if (!iterator.hasNext()) {
            return EMPTY;
        }

        StringBuilder sb = new StringBuilder(iterator.next().toString());

        while (iterator.hasNext()) {
            sb.append(split);
            sb.append(toString(iterator.next()).toString());
        }

        return sb.toString();
    }

    public static String toString(Object obj) {
        if (obj == null) {
            return NULL;
        } else {
            return obj.toString();
        }
    }
}

Related

1. joinArrays(T[] a, T[] b)
2. joinAttributes(final String[] atts1, final String[] atts2)
3. joinByComma(String[] values)
4. joinByteArrays(final byte[] array1, byte[] array2)
5. joinBytesArrays(byte[]... args)
6. joinParetos(double[][] pareto1, double[][] pareto2)
7. joinString(String delimiter, String[] strings)
8. joinString(String[] array)
9. joinString(String[] str, String delimiter)