档案日期2016的42

下面的Java代码实现了正弦、余弦波形图的绘制，main方法位于DataWindow.java中。

DataPanel.java

import java.awt.Color;
import java.awt.Graphics;
import java.text.DateFormat;
import java.util.ArrayList;

import javax.swing.JPanel;

public class DataPanel extends JPanel {

    private static final long serialVersionUID = -9039511286331044798L;

    private int index ...

题目描述：

LeetCode 432. All O`one Data Structure

Implement a data structure supporting the following operations:

1. Inc(Key) - Inserts a new key with value 1. Or increments an existing key by 1. Key is guaranteed to be a non-empty string ...