Calculate Number Frequency

【0，1，2，3，4，5，6，7，8，9】

以此类推..

package shuai.study.frequency;

/**
 * @author shengshu
 * 
 */
public class NumberFrequency {
	private final int len = 10;

	private int[] numberArray = null;
	private int[] frequencyArray = null;

	public NumberFrequency() {
		numberArray = new int[len];
		frequencyArray = new int[len];
	}

	// Initialize numberArray
	public void initNumberArray() {
		for (int i = 0; i < len; i++) {
			numberArray[i] = i;
		}
	}

	// Get final frequencyArray
	public int[] getFrequencyArray() {
		while (isSetFrequencyArray(numberArray)) {
			isSetFrequencyArray(numberArray);
		}

		return frequencyArray;
	}

	// Whether set frequencyArray according to judging 'frequencyArray[i] != frequency'
	public boolean isSetFrequencyArray(int[] numberArray) {
		boolean setNextFrequencyFlag = false;

		for (int i = 0; i < len; i++) {
			int frequency = getFrequency(numberArray[i]);

			if (frequencyArray[i] != frequency) {
				frequencyArray[i] = frequency;
				setNextFrequencyFlag = true;
			}
		}

		return setNextFrequencyFlag;
	}

	// Get numberArray's element(number) frequency 
	public int getFrequency(int number) {
		int frequency = 0;

		for (int i = 0; i < len; i++) {
			if (frequencyArray[i] == number) {
				frequency++;
			}
		}

		return frequency;
	}

	// Print array
	public void printArray(int[] array) {
		for (int i = 0; i < array.length; i++) {
			System.out.print(array[i] + "\t");
		}
	}

	// Main thread
	public static void main(String[] args) {
		NumberFrequency numberFrequency = new NumberFrequency();

		numberFrequency.initNumberArray();
		int[] frequencyArray = numberFrequency.getFrequencyArray();
		numberFrequency.printArray(frequencyArray);
	}
}

Calculate Number Frequency,布布扣,bubuko.com

Calculate Number Frequency

原文：http://blog.csdn.net/three_man/article/details/38235941