month.html

jfreechart1。0。2的api。

<FONT color="green">173</FONT>    <a name="line.173"></a>
<FONT color="green">174</FONT>            Month result;<a name="line.174"></a>
<FONT color="green">175</FONT>            if (this.month != MonthConstants.JANUARY) {<a name="line.175"></a>
<FONT color="green">176</FONT>                result = new Month(this.month - 1, this.year);<a name="line.176"></a>
<FONT color="green">177</FONT>            }<a name="line.177"></a>
<FONT color="green">178</FONT>            else {<a name="line.178"></a>
<FONT color="green">179</FONT>                Year prevYear = (Year) this.year.previous();<a name="line.179"></a>
<FONT color="green">180</FONT>                if (prevYear != null) {<a name="line.180"></a>
<FONT color="green">181</FONT>                    result = new Month(MonthConstants.DECEMBER, prevYear);<a name="line.181"></a>
<FONT color="green">182</FONT>                }<a name="line.182"></a>
<FONT color="green">183</FONT>                else {<a name="line.183"></a>
<FONT color="green">184</FONT>                    result = null;<a name="line.184"></a>
<FONT color="green">185</FONT>                }<a name="line.185"></a>
<FONT color="green">186</FONT>            }<a name="line.186"></a>
<FONT color="green">187</FONT>            return result;<a name="line.187"></a>
<FONT color="green">188</FONT>    <a name="line.188"></a>
<FONT color="green">189</FONT>        }<a name="line.189"></a>
<FONT color="green">190</FONT>    <a name="line.190"></a>
<FONT color="green">191</FONT>        /**<a name="line.191"></a>
<FONT color="green">192</FONT>         * Returns the month following this one.<a name="line.192"></a>
<FONT color="green">193</FONT>         *<a name="line.193"></a>
<FONT color="green">194</FONT>         * @return The month following this one.<a name="line.194"></a>
<FONT color="green">195</FONT>         */<a name="line.195"></a>
<FONT color="green">196</FONT>        public RegularTimePeriod next() {<a name="line.196"></a>
<FONT color="green">197</FONT>            Month result;<a name="line.197"></a>
<FONT color="green">198</FONT>            if (this.month != MonthConstants.DECEMBER) {<a name="line.198"></a>
<FONT color="green">199</FONT>                result = new Month(this.month + 1, this.year);<a name="line.199"></a>
<FONT color="green">200</FONT>            }<a name="line.200"></a>
<FONT color="green">201</FONT>            else {<a name="line.201"></a>
<FONT color="green">202</FONT>                Year nextYear = (Year) this.year.next();<a name="line.202"></a>
<FONT color="green">203</FONT>                if (nextYear != null) {<a name="line.203"></a>
<FONT color="green">204</FONT>                    result = new Month(MonthConstants.JANUARY, nextYear);<a name="line.204"></a>
<FONT color="green">205</FONT>                }<a name="line.205"></a>
<FONT color="green">206</FONT>                else {<a name="line.206"></a>
<FONT color="green">207</FONT>                    result = null;<a name="line.207"></a>
<FONT color="green">208</FONT>                }<a name="line.208"></a>
<FONT color="green">209</FONT>            }<a name="line.209"></a>
<FONT color="green">210</FONT>            return result;<a name="line.210"></a>
<FONT color="green">211</FONT>        }<a name="line.211"></a>
<FONT color="green">212</FONT>    <a name="line.212"></a>
<FONT color="green">213</FONT>        /**<a name="line.213"></a>
<FONT color="green">214</FONT>         * Returns a serial index number for the month.<a name="line.214"></a>
<FONT color="green">215</FONT>         *<a name="line.215"></a>
<FONT color="green">216</FONT>         * @return The serial index number.<a name="line.216"></a>
<FONT color="green">217</FONT>         */<a name="line.217"></a>
<FONT color="green">218</FONT>        public long getSerialIndex() {<a name="line.218"></a>
<FONT color="green">219</FONT>            return this.year.getYear() * 12L + this.month;<a name="line.219"></a>
<FONT color="green">220</FONT>        }<a name="line.220"></a>
<FONT color="green">221</FONT>    <a name="line.221"></a>
<FONT color="green">222</FONT>        /**<a name="line.222"></a>
<FONT color="green">223</FONT>         * Returns a string representing the month (e.g. "January 2002").<a name="line.223"></a>
<FONT color="green">224</FONT>         * &lt;P&gt;<a name="line.224"></a>
<FONT color="green">225</FONT>         * To do: look at internationalisation.<a name="line.225"></a>
<FONT color="green">226</FONT>         *<a name="line.226"></a>
<FONT color="green">227</FONT>         * @return A string representing the month.<a name="line.227"></a>
<FONT color="green">228</FONT>         */<a name="line.228"></a>
<FONT color="green">229</FONT>        public String toString() {<a name="line.229"></a>
<FONT color="green">230</FONT>            return SerialDate.monthCodeToString(this.month) + " " + this.year;<a name="line.230"></a>
<FONT color="green">231</FONT>        }<a name="line.231"></a>
<FONT color="green">232</FONT>    <a name="line.232"></a>
<FONT color="green">233</FONT>        /**<a name="line.233"></a>
<FONT color="green">234</FONT>         * Tests the equality of this Month object to an arbitrary object.<a name="line.234"></a>
<FONT color="green">235</FONT>         * Returns true if the target is a Month instance representing the same<a name="line.235"></a>
<FONT color="green">236</FONT>         * month as this object.  In all other cases, returns false.<a name="line.236"></a>
<FONT color="green">237</FONT>         *<a name="line.237"></a>
<FONT color="green">238</FONT>         * @param obj  the object.<a name="line.238"></a>
<FONT color="green">239</FONT>         *<a name="line.239"></a>
<FONT color="green">240</FONT>         * @return &lt;code&gt;true&lt;/code&gt; if month and year of this and object are the <a name="line.240"></a>
<FONT color="green">241</FONT>         *         same.<a name="line.241"></a>
<FONT color="green">242</FONT>         */<a name="line.242"></a>
<FONT color="green">243</FONT>        public boolean equals(Object obj) {<a name="line.243"></a>
<FONT color="green">244</FONT>    <a name="line.244"></a>
<FONT color="green">245</FONT>            if (obj != null) {<a name="line.245"></a>
<FONT color="green">246</FONT>                if (obj instanceof Month) {<a name="line.246"></a>
<FONT color="green">247</FONT>                    Month target = (Month) obj;<a name="line.247"></a>
<FONT color="green">248</FONT>                    return (<a name="line.248"></a>
<FONT color="green">249</FONT>                        (this.month == target.getMonth()) <a name="line.249"></a>
<FONT color="green">250</FONT>                            &amp;&amp; (this.year.equals(target.getYear()))<a name="line.250"></a>
<FONT color="green">251</FONT>                    );<a name="line.251"></a>
<FONT color="green">252</FONT>                }<a name="line.252"></a>
<FONT color="green">253</FONT>                else {<a name="line.253"></a>
<FONT color="green">254</FONT>                    return false;<a name="line.254"></a>
<FONT color="green">255</FONT>                }<a name="line.255"></a>
<FONT color="green">256</FONT>            }<a name="line.256"></a>
<FONT color="green">257</FONT>            else {<a name="line.257"></a>
<FONT color="green">258</FONT>                return false;<a name="line.258"></a>
<FONT color="green">259</FONT>            }<a name="line.259"></a>
<FONT color="green">260</FONT>    <a name="line.260"></a>
<FONT color="green">261</FONT>        }<a name="line.261"></a>
<FONT color="green">262</FONT>    <a name="line.262"></a>
<FONT color="green">263</FONT>        /**<a name="line.263"></a>
<FONT color="green">264</FONT>         * Returns a hash code for this object instance.  The approach described by<a name="line.264"></a>
<FONT color="green">265</FONT>         * Joshua Bloch in "Effective Java" has been used here:<a name="line.265"></a>
<FONT color="green">266</FONT>         * &lt;p&gt;<a name="line.266"></a>
<FONT color="green">267</FONT>         * &lt;code&gt;http://developer.java.sun.com/developer/Books/effectivejava<a name="line.267"></a>
<FONT color="green">268</FONT>         * /Chapter3.pdf&lt;/code&gt;<a name="line.268"></a>
<FONT color="green">269</FONT>         * <a name="line.269"></a>
<FONT color="green">270</FONT>         * @return A hash code.<a name="line.270"></a>
<FONT color="green">271</FONT>         */<a name="line.271"></a>
<FONT color="green">272</FONT>        public int hashCode() {<a name="line.272"></a>
<FONT color="green">273</FONT>            int result = 17;<a name="line.273"></a>
<FONT color="green">274</FONT>            result = 37 * result + this.month;<a name="line.274"></a>
<FONT color="green">275</FONT>            result = 37 * result + this.year.hashCode();<a name="line.275"></a>
<FONT color="green">276</FONT>            return result;<a name="line.276"></a>
<FONT color="green">277</FONT>        }<a name="line.277"></a>
<FONT color="green">278</FONT>    <a name="line.278"></a>
<FONT color="green">279</FONT>        /**<a name="line.279"></a>
<FONT color="green">280</FONT>         * Returns an integer indicating the order of this Month object relative to<a name="line.280"></a>
<FONT color="green">281</FONT>         * the specified<a name="line.281"></a>
<FONT color="green">282</FONT>         * object: negative == before, zero == same, positive == after.<a name="line.282"></a>
<FONT color="green">283</FONT>         *<a name="line.283"></a>
<FONT color="green">284</FONT>         * @param o1  the object to compare.<a name="line.284"></a>
<FONT color="green">285</FONT>         *<a name="line.285"></a>
<FONT color="green">286</FONT>         * @return negative == before, zero == same, positive == after.<a name="line.286"></a>
<FONT color="green">287</FONT>         */<a name="line.287"></a>
<FONT color="green">288</FONT>        public int compareTo(Object o1) {<a name="line.288"></a>
<FONT color="green">289</FONT>    <a name="line.289"></a>
<FONT color="green">290</FONT>            int result;<a name="line.290"></a>
<FONT color="green">291</FONT>    <a name="line.291"></a>
<FONT color="green">292</FONT>            // CASE 1 : Comparing to another Month object<a name="line.292"></a>
<FONT color="green">293</FONT>            // --------------------------------------------<a name="line.293"></a>
<FONT color="green">294</FONT>            if (o1 instanceof Month) {<a name="line.294"></a>
<FONT color="green">295</FONT>                Month m = (Month) o1;<a name="line.295"></a>
<FONT color="green">296</FONT>                result = this.year.getYear() - m.getYear().getYear();<a name="line.296"></a>
<FONT color="green">297</FONT>                if (result == 0) {<a name="line.297"></a>
<FONT color="green">298</FONT>                    result = this.month - m.getMonth();<a name="line.298"></a>
<FONT color="green">299</FONT>                }<a name="line.299"></a>
<FONT color="green">300</FONT>            }<a name="line.300"></a>
<FONT color="green">301</FONT>    <a name="line.301"></a>
<FONT color="green">302</FONT>            // CASE 2 : Comparing to another TimePeriod object<a name="line.302"></a>
<FONT color="green">303</FONT>            // -----------------------------------------------<a name="line.303"></a>
<FONT color="green">304</FONT>            else if (o1 instanceof RegularTimePeriod) {<a name="line.304"></a>
<FONT color="green">305</FONT>                // more difficult case - evaluate later...<a name="line.305"></a>
<FONT color="green">306</FONT>                result = 0;<a name="line.306"></a>
<FONT color="green">307</FONT>            }<a name="line.307"></a>
<FONT color="green">308</FONT>    <a name="line.308"></a>
<FONT color="green">309</FONT>            // CASE 3 : Comparing to a non-TimePeriod object<a name="line.309"></a>
<FONT color="green">310</FONT>            // ---------------------------------------------<a name="line.310"></a>
<FONT color="green">311</FONT>            else {<a name="line.311"></a>
<FONT color="green">312</FONT>                // consider time periods to be ordered after general objects<a name="line.312"></a>
<FONT color="green">313</FONT>                result = 1;<a name="line.313"></a>
<FONT color="green">314</FONT>            }<a name="line.314"></a>
<FONT color="green">315</FONT>    <a name="line.315"></a>
<FONT color="green">316</FONT>            return result;<a name="line.316"></a>
<FONT color="green">317</FONT>    <a name="line.317"></a>
<FONT color="green">318</FONT>        }<a name="line.318"></a>
<FONT color="green">319</FONT>    <a name="line.319"></a>
<FONT color="green">320</FONT>        /**<a name="line.320"></a>
<FONT color="green">321</FONT>         * Returns the first millisecond of the month, evaluated using the supplied<a name="line.321"></a>
<FONT color="green">322</FONT>         * calendar (which determines the time zone).<a name="line.322"></a>
<FONT color="green">323</FONT>         *<a name="line.323"></a>
<FONT color="green">324</FONT>         * @param calendar  the calendar.<a name="line.324"></a>
<FONT color="green">325</FONT>         *<a name="line.325"></a>
<FONT color="green">326</FONT>         * @return The first millisecond of the month.<a name="line.326"></a>
<FONT color="green">327</FONT>         */<a name="line.327"></a>
<FONT color="green">328</FONT>        public long getFirstMillisecond(Calendar calendar) {<a name="line.328"></a>
<FONT color="green">329</FONT>            Day first = new Day(1, this.month, this.year.getYear());<a name="line.329"></a>
<FONT color="green">330</FONT>            return first.getFirstMillisecond(calendar);<a name="line.330"></a>
<FONT color="green">331</FONT>        }<a name="line.331"></a>
<FONT color="green">332</FONT>    <a name="line.332"></a>
<FONT color="green">333</FONT>        /**<a name="line.333"></a>
<FONT color="green">334</FONT>         * Returns the last millisecond of the month, evaluated using the supplied<a name="line.334"></a>
<FONT color="green">335</FONT>         * calendar (which determines the time zone).<a name="line.335"></a>
<FONT color="green">336</FONT>         *<a name="line.336"></a>
<FONT color="green">337</FONT>         * @param calendar  the calendar.<a name="line.337"></a>
<FONT color="green">338</FONT>         *<a name="line.338"></a>
<FONT color="green">339</FONT>         * @return The last millisecond of the month.<a name="line.339"></a>
<FONT color="green">340</FONT>         */<a name="line.340"></a>
<FONT color="green">341</FONT>        public long getLastMillisecond(Calendar calendar) {<a name="line.341"></a>
<FONT color="green">342</FONT>            int eom = SerialDate.lastDayOfMonth(this.month, this.year.getYear());<a name="line.342"></a>
<FONT color="green">343</FONT>            Day last = new Day(eom, this.month, this.year.getYear());<a name="line.343"></a>
<FONT color="green">344</FONT>            return last.getLastMillisecond(calendar);<a name="line.344"></a>
<FONT color="green">345</FONT>        }<a name="line.345"></a>
<FONT color="green">346</FONT>    <a name="line.346"></a>
<FONT color="green">347</FONT>        /**<a name="line.347"></a>