defaultkeyedvalues.html

jfreechart1。0。2的api。

<FONT color="green">147</FONT>            if (key == null) {<a name="line.147"></a>
<FONT color="green">148</FONT>                throw new IllegalArgumentException("Null 'key' argument.");<a name="line.148"></a>
<FONT color="green">149</FONT>            }<a name="line.149"></a>
<FONT color="green">150</FONT>            int i = 0;<a name="line.150"></a>
<FONT color="green">151</FONT>            Iterator iterator = this.data.iterator();<a name="line.151"></a>
<FONT color="green">152</FONT>            while (iterator.hasNext()) {<a name="line.152"></a>
<FONT color="green">153</FONT>                KeyedValue kv = (KeyedValue) iterator.next();<a name="line.153"></a>
<FONT color="green">154</FONT>                if (kv.getKey().equals(key)) {<a name="line.154"></a>
<FONT color="green">155</FONT>                    return i;<a name="line.155"></a>
<FONT color="green">156</FONT>                }<a name="line.156"></a>
<FONT color="green">157</FONT>                i++;<a name="line.157"></a>
<FONT color="green">158</FONT>            }<a name="line.158"></a>
<FONT color="green">159</FONT>            return -1;  // key not found<a name="line.159"></a>
<FONT color="green">160</FONT>        }<a name="line.160"></a>
<FONT color="green">161</FONT>    <a name="line.161"></a>
<FONT color="green">162</FONT>        /**<a name="line.162"></a>
<FONT color="green">163</FONT>         * Returns the keys for the values in the collection.<a name="line.163"></a>
<FONT color="green">164</FONT>         *<a name="line.164"></a>
<FONT color="green">165</FONT>         * @return The keys (never &lt;code&gt;null&lt;/code&gt;).<a name="line.165"></a>
<FONT color="green">166</FONT>         */<a name="line.166"></a>
<FONT color="green">167</FONT>        public List getKeys() {<a name="line.167"></a>
<FONT color="green">168</FONT>            List result = new java.util.ArrayList();<a name="line.168"></a>
<FONT color="green">169</FONT>            Iterator iterator = this.data.iterator();<a name="line.169"></a>
<FONT color="green">170</FONT>            while (iterator.hasNext()) {<a name="line.170"></a>
<FONT color="green">171</FONT>                KeyedValue kv = (KeyedValue) iterator.next();<a name="line.171"></a>
<FONT color="green">172</FONT>                result.add(kv.getKey());<a name="line.172"></a>
<FONT color="green">173</FONT>            }<a name="line.173"></a>
<FONT color="green">174</FONT>            return result;<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>        /**<a name="line.177"></a>
<FONT color="green">178</FONT>         * Returns the value for a given key.<a name="line.178"></a>
<FONT color="green">179</FONT>         *<a name="line.179"></a>
<FONT color="green">180</FONT>         * @param key  the key.<a name="line.180"></a>
<FONT color="green">181</FONT>         *<a name="line.181"></a>
<FONT color="green">182</FONT>         * @return The value (possibly &lt;code&gt;null&lt;/code&gt;).<a name="line.182"></a>
<FONT color="green">183</FONT>         * <a name="line.183"></a>
<FONT color="green">184</FONT>         * @throws UnknownKeyException if the key is not recognised.<a name="line.184"></a>
<FONT color="green">185</FONT>         */<a name="line.185"></a>
<FONT color="green">186</FONT>        public Number getValue(Comparable key) {<a name="line.186"></a>
<FONT color="green">187</FONT>            int index = getIndex(key);<a name="line.187"></a>
<FONT color="green">188</FONT>            if (index &lt; 0) {<a name="line.188"></a>
<FONT color="green">189</FONT>                throw new UnknownKeyException("Key not found: " + key);<a name="line.189"></a>
<FONT color="green">190</FONT>            }<a name="line.190"></a>
<FONT color="green">191</FONT>            return getValue(index);<a name="line.191"></a>
<FONT color="green">192</FONT>        }<a name="line.192"></a>
<FONT color="green">193</FONT>    <a name="line.193"></a>
<FONT color="green">194</FONT>        /**<a name="line.194"></a>
<FONT color="green">195</FONT>         * Updates an existing value, or adds a new value to the collection.<a name="line.195"></a>
<FONT color="green">196</FONT>         *<a name="line.196"></a>
<FONT color="green">197</FONT>         * @param key  the key (&lt;code&gt;null&lt;/code&gt; not permitted).<a name="line.197"></a>
<FONT color="green">198</FONT>         * @param value  the value.<a name="line.198"></a>
<FONT color="green">199</FONT>         */<a name="line.199"></a>
<FONT color="green">200</FONT>        public void addValue(Comparable key, double value) {<a name="line.200"></a>
<FONT color="green">201</FONT>            addValue(key, new Double(value)); <a name="line.201"></a>
<FONT color="green">202</FONT>        }<a name="line.202"></a>
<FONT color="green">203</FONT>        <a name="line.203"></a>
<FONT color="green">204</FONT>        /**<a name="line.204"></a>
<FONT color="green">205</FONT>         * Adds a new value to the collection, or updates an existing value.<a name="line.205"></a>
<FONT color="green">206</FONT>         * This method passes control directly to the <a name="line.206"></a>
<FONT color="green">207</FONT>         * {@link #setValue(Comparable, Number)} method.<a name="line.207"></a>
<FONT color="green">208</FONT>         *<a name="line.208"></a>
<FONT color="green">209</FONT>         * @param key  the key (&lt;code&gt;null&lt;/code&gt; not permitted).<a name="line.209"></a>
<FONT color="green">210</FONT>         * @param value  the value (&lt;code&gt;null&lt;/code&gt; permitted).<a name="line.210"></a>
<FONT color="green">211</FONT>         */<a name="line.211"></a>
<FONT color="green">212</FONT>        public void addValue(Comparable key, Number value) {<a name="line.212"></a>
<FONT color="green">213</FONT>            setValue(key, value);<a name="line.213"></a>
<FONT color="green">214</FONT>        }<a name="line.214"></a>
<FONT color="green">215</FONT>    <a name="line.215"></a>
<FONT color="green">216</FONT>        /**<a name="line.216"></a>
<FONT color="green">217</FONT>         * Updates an existing value, or adds a new value to the collection.<a name="line.217"></a>
<FONT color="green">218</FONT>         *<a name="line.218"></a>
<FONT color="green">219</FONT>         * @param key  the key (&lt;code&gt;null&lt;/code&gt; not permitted).<a name="line.219"></a>
<FONT color="green">220</FONT>         * @param value  the value.<a name="line.220"></a>
<FONT color="green">221</FONT>         */<a name="line.221"></a>
<FONT color="green">222</FONT>        public void setValue(Comparable key, double value) {<a name="line.222"></a>
<FONT color="green">223</FONT>            setValue(key, new Double(value));   <a name="line.223"></a>
<FONT color="green">224</FONT>        }<a name="line.224"></a>
<FONT color="green">225</FONT>        <a name="line.225"></a>
<FONT color="green">226</FONT>        /**<a name="line.226"></a>
<FONT color="green">227</FONT>         * Updates an existing value, or adds a new value to the collection.<a name="line.227"></a>
<FONT color="green">228</FONT>         *<a name="line.228"></a>
<FONT color="green">229</FONT>         * @param key  the key (&lt;code&gt;null&lt;/code&gt; not permitted).<a name="line.229"></a>
<FONT color="green">230</FONT>         * @param value  the value (&lt;code&gt;null&lt;/code&gt; permitted).<a name="line.230"></a>
<FONT color="green">231</FONT>         */<a name="line.231"></a>
<FONT color="green">232</FONT>        public void setValue(Comparable key, Number value) {<a name="line.232"></a>
<FONT color="green">233</FONT>            if (key == null) {<a name="line.233"></a>
<FONT color="green">234</FONT>                throw new IllegalArgumentException("Null 'key' argument.");<a name="line.234"></a>
<FONT color="green">235</FONT>            }<a name="line.235"></a>
<FONT color="green">236</FONT>            int keyIndex = getIndex(key);<a name="line.236"></a>
<FONT color="green">237</FONT>            if (keyIndex &gt;= 0) {<a name="line.237"></a>
<FONT color="green">238</FONT>                DefaultKeyedValue kv = (DefaultKeyedValue) this.data.get(keyIndex);<a name="line.238"></a>
<FONT color="green">239</FONT>                kv.setValue(value);<a name="line.239"></a>
<FONT color="green">240</FONT>            }<a name="line.240"></a>
<FONT color="green">241</FONT>            else {<a name="line.241"></a>
<FONT color="green">242</FONT>                KeyedValue kv = new DefaultKeyedValue(key, value);<a name="line.242"></a>
<FONT color="green">243</FONT>                this.data.add(kv);<a name="line.243"></a>
<FONT color="green">244</FONT>            }<a name="line.244"></a>
<FONT color="green">245</FONT>        }<a name="line.245"></a>
<FONT color="green">246</FONT>    <a name="line.246"></a>
<FONT color="green">247</FONT>        /**<a name="line.247"></a>
<FONT color="green">248</FONT>         * Removes a value from the collection.<a name="line.248"></a>
<FONT color="green">249</FONT>         *<a name="line.249"></a>
<FONT color="green">250</FONT>         * @param index  the index of the item to remove (in the range <a name="line.250"></a>
<FONT color="green">251</FONT>         *     &lt;code&gt;0&lt;/code&gt; to &lt;code&gt;getItemCount() - 1&lt;/code&gt;).<a name="line.251"></a>
<FONT color="green">252</FONT>         *     <a name="line.252"></a>
<FONT color="green">253</FONT>         * @throws IndexOutOfBoundsException if &lt;code&gt;index&lt;/code&gt; is not within<a name="line.253"></a>
<FONT color="green">254</FONT>         *     the specified range.<a name="line.254"></a>
<FONT color="green">255</FONT>         */<a name="line.255"></a>
<FONT color="green">256</FONT>        public void removeValue(int index) {<a name="line.256"></a>
<FONT color="green">257</FONT>            this.data.remove(index);<a name="line.257"></a>
<FONT color="green">258</FONT>        }<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>         * Removes a value from the collection.  If there is no item with the <a name="line.261"></a>
<FONT color="green">262</FONT>         * specified key, this method does nothing.<a name="line.262"></a>
<FONT color="green">263</FONT>         *<a name="line.263"></a>
<FONT color="green">264</FONT>         * @param key  the item key (&lt;code&gt;null&lt;/code&gt; not permitted).<a name="line.264"></a>
<FONT color="green">265</FONT>         * <a name="line.265"></a>
<FONT color="green">266</FONT>         * @throws IllegalArgumentException if &lt;code&gt;key&lt;/code&gt; is <a name="line.266"></a>
<FONT color="green">267</FONT>         *     &lt;code&gt;null&lt;/code&gt;.<a name="line.267"></a>
<FONT color="green">268</FONT>         */<a name="line.268"></a>
<FONT color="green">269</FONT>        public void removeValue(Comparable key) {<a name="line.269"></a>
<FONT color="green">270</FONT>            int index = getIndex(key);<a name="line.270"></a>
<FONT color="green">271</FONT>            if (index &gt;= 0) {<a name="line.271"></a>
<FONT color="green">272</FONT>                removeValue(index);<a name="line.272"></a>
<FONT color="green">273</FONT>            }<a name="line.273"></a>
<FONT color="green">274</FONT>        }<a name="line.274"></a>
<FONT color="green">275</FONT>        <a name="line.275"></a>
<FONT color="green">276</FONT>        /**<a name="line.276"></a>
<FONT color="green">277</FONT>         * Clears all values from the collection.<a name="line.277"></a>
<FONT color="green">278</FONT>         * <a name="line.278"></a>
<FONT color="green">279</FONT>         * @since 1.0.2<a name="line.279"></a>
<FONT color="green">280</FONT>         */<a name="line.280"></a>
<FONT color="green">281</FONT>        public void clear() {<a name="line.281"></a>
<FONT color="green">282</FONT>            this.data.clear();<a name="line.282"></a>
<FONT color="green">283</FONT>        }<a name="line.283"></a>
<FONT color="green">284</FONT>    <a name="line.284"></a>
<FONT color="green">285</FONT>        /**<a name="line.285"></a>
<FONT color="green">286</FONT>         * Sorts the items in the list by key.<a name="line.286"></a>
<FONT color="green">287</FONT>         *<a name="line.287"></a>
<FONT color="green">288</FONT>         * @param order  the sort order (&lt;code&gt;null&lt;/code&gt; not permitted).<a name="line.288"></a>
<FONT color="green">289</FONT>         */<a name="line.289"></a>
<FONT color="green">290</FONT>        public void sortByKeys(SortOrder order) {<a name="line.290"></a>
<FONT color="green">291</FONT>            Comparator comparator = new KeyedValueComparator(<a name="line.291"></a>
<FONT color="green">292</FONT>                KeyedValueComparatorType.BY_KEY, order<a name="line.292"></a>
<FONT color="green">293</FONT>            );<a name="line.293"></a>
<FONT color="green">294</FONT>            Collections.sort(this.data, comparator);<a name="line.294"></a>
<FONT color="green">295</FONT>        }<a name="line.295"></a>