printing.java

来自「java 的源代码」· Java 代码 · 共 69 行

package com.reddragon2046.base.utilities.data.algorithms;

import com.reddragon2046.base.utilities.data.InputIterator;
import com.reddragon2046.base.utilities.data.util.IteratorFactory;
import java.io.PrintStream;
import java.util.Collection;
import java.util.Iterator;

public final class Printing
{

    private Printing()
    {
    }

    public static String toString(Collection collection, String name)
    {
        return name + toString(IteratorFactory.start(collection), IteratorFactory.finish(collection));
    }

    public static String toString(Collection collection)
    {
        return toString(collection, "");
    }

    private static String toString(InputIterator first, InputIterator last)
    {
        if(!first.isCompatibleWith(last))
        {
            String msg = "\"first\" iterator and \"last\" iterator not compatible (" + first.getClass().getName() + ", " + last.getClass().getName() + ")";
            throw new IllegalArgumentException(msg);
        }
        if(first.atEnd())
            return "[]";
        InputIterator firstx = (InputIterator)first.clone();
        StringBuffer buffer = new StringBuffer();
        buffer.append("[");
        boolean firstone = true;
        for(; !firstx.equals(last); buffer.append(firstx.next()))
            if(firstone)
                firstone = false;
            else
                buffer.append(", ");

        buffer.append("]");
        return buffer.toString();
    }

    private static void print(InputIterator first, InputIterator last)
    {
        System.out.print(toString(first, last));
    }

    public static void print(Collection collection)
    {
        System.out.print(toString(IteratorFactory.start(collection), IteratorFactory.finish(collection)));
    }

    private static void println(InputIterator first, InputIterator last)
    {
        System.out.println(toString(first, last));
    }

    public static void println(Collection collection)
    {
        System.out.println(toString(IteratorFactory.start(collection), IteratorFactory.finish(collection)));
    }
}