quarter.html

jfreechart1。0。2的api。

<FONT color="green">154</FONT>            this.year = new Year(calendar.get(Calendar.YEAR));<a name="line.154"></a>
<FONT color="green">155</FONT>    <a name="line.155"></a>
<FONT color="green">156</FONT>        }<a name="line.156"></a>
<FONT color="green">157</FONT>    <a name="line.157"></a>
<FONT color="green">158</FONT>        /**<a name="line.158"></a>
<FONT color="green">159</FONT>         * Returns the quarter.<a name="line.159"></a>
<FONT color="green">160</FONT>         *<a name="line.160"></a>
<FONT color="green">161</FONT>         * @return The quarter.<a name="line.161"></a>
<FONT color="green">162</FONT>         */<a name="line.162"></a>
<FONT color="green">163</FONT>        public int getQuarter() {<a name="line.163"></a>
<FONT color="green">164</FONT>            return this.quarter;<a name="line.164"></a>
<FONT color="green">165</FONT>        }<a name="line.165"></a>
<FONT color="green">166</FONT>    <a name="line.166"></a>
<FONT color="green">167</FONT>        /**<a name="line.167"></a>
<FONT color="green">168</FONT>         * Returns the year.<a name="line.168"></a>
<FONT color="green">169</FONT>         *<a name="line.169"></a>
<FONT color="green">170</FONT>         * @return The year.<a name="line.170"></a>
<FONT color="green">171</FONT>         */<a name="line.171"></a>
<FONT color="green">172</FONT>        public Year getYear() {<a name="line.172"></a>
<FONT color="green">173</FONT>            return this.year;<a name="line.173"></a>
<FONT color="green">174</FONT>        }<a name="line.174"></a>
<FONT color="green">175</FONT>    <a name="line.175"></a>
<FONT color="green">176</FONT>        /**<a name="line.176"></a>
<FONT color="green">177</FONT>         * Returns the quarter preceding this one.<a name="line.177"></a>
<FONT color="green">178</FONT>         *<a name="line.178"></a>
<FONT color="green">179</FONT>         * @return The quarter preceding this one (or null if this is Q1 1900).<a name="line.179"></a>
<FONT color="green">180</FONT>         */<a name="line.180"></a>
<FONT color="green">181</FONT>        public RegularTimePeriod previous() {<a name="line.181"></a>
<FONT color="green">182</FONT>    <a name="line.182"></a>
<FONT color="green">183</FONT>            Quarter result;<a name="line.183"></a>
<FONT color="green">184</FONT>            if (this.quarter &gt; FIRST_QUARTER) {<a name="line.184"></a>
<FONT color="green">185</FONT>                result = new Quarter(this.quarter - 1, this.year);<a name="line.185"></a>
<FONT color="green">186</FONT>            }<a name="line.186"></a>
<FONT color="green">187</FONT>            else {<a name="line.187"></a>
<FONT color="green">188</FONT>                Year prevYear = (Year) this.year.previous();<a name="line.188"></a>
<FONT color="green">189</FONT>                if (prevYear != null) {<a name="line.189"></a>
<FONT color="green">190</FONT>                    result = new Quarter(LAST_QUARTER, prevYear);<a name="line.190"></a>
<FONT color="green">191</FONT>                }<a name="line.191"></a>
<FONT color="green">192</FONT>                else {<a name="line.192"></a>
<FONT color="green">193</FONT>                    result = null;<a name="line.193"></a>
<FONT color="green">194</FONT>                }<a name="line.194"></a>
<FONT color="green">195</FONT>            }<a name="line.195"></a>
<FONT color="green">196</FONT>            return result;<a name="line.196"></a>
<FONT color="green">197</FONT>    <a name="line.197"></a>
<FONT color="green">198</FONT>        }<a name="line.198"></a>
<FONT color="green">199</FONT>    <a name="line.199"></a>
<FONT color="green">200</FONT>        /**<a name="line.200"></a>
<FONT color="green">201</FONT>         * Returns the quarter following this one.<a name="line.201"></a>
<FONT color="green">202</FONT>         *<a name="line.202"></a>
<FONT color="green">203</FONT>         * @return The quarter following this one (or null if this is Q4 9999).<a name="line.203"></a>
<FONT color="green">204</FONT>         */<a name="line.204"></a>
<FONT color="green">205</FONT>        public RegularTimePeriod next() {<a name="line.205"></a>
<FONT color="green">206</FONT>    <a name="line.206"></a>
<FONT color="green">207</FONT>            Quarter result;<a name="line.207"></a>
<FONT color="green">208</FONT>            if (this.quarter &lt; LAST_QUARTER) {<a name="line.208"></a>
<FONT color="green">209</FONT>                result = new Quarter(this.quarter + 1, this.year);<a name="line.209"></a>
<FONT color="green">210</FONT>            }<a name="line.210"></a>
<FONT color="green">211</FONT>            else {<a name="line.211"></a>
<FONT color="green">212</FONT>                Year nextYear = (Year) this.year.next();<a name="line.212"></a>
<FONT color="green">213</FONT>                if (nextYear != null) {<a name="line.213"></a>
<FONT color="green">214</FONT>                    result = new Quarter(FIRST_QUARTER, nextYear);<a name="line.214"></a>
<FONT color="green">215</FONT>                }<a name="line.215"></a>
<FONT color="green">216</FONT>                else {<a name="line.216"></a>
<FONT color="green">217</FONT>                    result = null;<a name="line.217"></a>
<FONT color="green">218</FONT>                }<a name="line.218"></a>
<FONT color="green">219</FONT>            }<a name="line.219"></a>
<FONT color="green">220</FONT>            return result;<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>    <a name="line.223"></a>
<FONT color="green">224</FONT>        /**<a name="line.224"></a>
<FONT color="green">225</FONT>         * Returns a serial index number for the quarter.<a name="line.225"></a>
<FONT color="green">226</FONT>         *<a name="line.226"></a>
<FONT color="green">227</FONT>         * @return The serial index number.<a name="line.227"></a>
<FONT color="green">228</FONT>         */<a name="line.228"></a>
<FONT color="green">229</FONT>        public long getSerialIndex() {<a name="line.229"></a>
<FONT color="green">230</FONT>            return this.year.getYear() * 4L + this.quarter;<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 Quarter object to an arbitrary object.<a name="line.234"></a>
<FONT color="green">235</FONT>         * Returns true if the target is a Quarter instance representing the same<a name="line.235"></a>
<FONT color="green">236</FONT>         * quarter 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 quarter and year of this and the object are<a name="line.240"></a>
<FONT color="green">241</FONT>         *         the 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 Quarter) {<a name="line.246"></a>
<FONT color="green">247</FONT>                    Quarter target = (Quarter) obj;<a name="line.247"></a>
<FONT color="green">248</FONT>                    return (<a name="line.248"></a>
<FONT color="green">249</FONT>                        (this.quarter == target.getQuarter()) <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.quarter;<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 Quarter object relative<a name="line.280"></a>
<FONT color="green">281</FONT>         * to the specified object:<a name="line.281"></a>
<FONT color="green">282</FONT>         *<a name="line.282"></a>
<FONT color="green">283</FONT>         * negative == before, zero == same, positive == after.<a name="line.283"></a>
<FONT color="green">284</FONT>         *<a name="line.284"></a>
<FONT color="green">285</FONT>         * @param o1  the object to compare<a name="line.285"></a>
<FONT color="green">286</FONT>         *<a name="line.286"></a>
<FONT color="green">287</FONT>         * @return negative == before, zero == same, positive == after.<a name="line.287"></a>
<FONT color="green">288</FONT>         */<a name="line.288"></a>
<FONT color="green">289</FONT>        public int compareTo(Object o1) {<a name="line.289"></a>
<FONT color="green">290</FONT>    <a name="line.290"></a>
<FONT color="green">291</FONT>            int result;<a name="line.291"></a>
<FONT color="green">292</FONT>    <a name="line.292"></a>
<FONT color="green">293</FONT>            // CASE 1 : Comparing to another Quarter object<a name="line.293"></a>
<FONT color="green">294</FONT>            // --------------------------------------------<a name="line.294"></a>
<FONT color="green">295</FONT>            if (o1 instanceof Quarter) {<a name="line.295"></a>
<FONT color="green">296</FONT>                Quarter q = (Quarter) o1;<a name="line.296"></a>
<FONT color="green">297</FONT>                result = this.year.getYear() - q.getYear().getYear();<a name="line.297"></a>
<FONT color="green">298</FONT>                if (result == 0) {<a name="line.298"></a>
<FONT color="green">299</FONT>                    result = this.quarter - q.getQuarter();<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>    <a name="line.302"></a>
<FONT color="green">303</FONT>            // CASE 2 : Comparing to another TimePeriod object<a name="line.303"></a>
<FONT color="green">304</FONT>            // -----------------------------------------------<a name="line.304"></a>
<FONT color="green">305</FONT>            else if (o1 instanceof RegularTimePeriod) {<a name="line.305"></a>
<FONT color="green">306</FONT>                // more difficult case - evaluate later...<a name="line.306"></a>
<FONT color="green">307</FONT>                result = 0;<a name="line.307"></a>
<FONT color="green">308</FONT>            }<a name="line.308"></a>
<FONT color="green">309</FONT>    <a name="line.309"></a>