Java Collection Join join(String delimiter, Collection objects)

Description

join

License

Open Source License

Declaration

public static String join(String delimiter, Collection<?> objects) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;

public class Main {
    public static String join(String delimiter, Object... objects) {
        return join(delimiter, Arrays.asList(objects));
    }//from  w ww .j a va 2 s .  c  o m

    public static String join(String delimiter, Collection<?> objects) {
        StringBuilder sb = new StringBuilder();
        Iterator<?> iterator = filterNulls(objects).iterator();
        while (iterator.hasNext()) {
            Object next = iterator.next();
            sb.append(String.valueOf(next));
            if (iterator.hasNext()) {
                sb.append(delimiter);
            }
        }
        return sb.toString();
    }

    public static List<?> filterNulls(Collection<?> objects) {
        List<Object> notNulls = new ArrayList<>();
        for (Object o : objects) {
            if (o != null) {
                notNulls.add(o);
            }
        }
        return notNulls;
    }
}

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