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<div align="center" class="title">JAVA程序員必讀：基礎(chǔ)篇（3）語(yǔ)言基礎(chǔ)</div>
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<div align="center"><font color="#666666">編譯：ZSC/太平洋網(wǎng)絡(luò)學(xué)院</font></div>
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<div align="right" class="gray"><a href="mailto:tntst@pconline.com.cn">［責(zé)編:爆破手］</a></div>
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<p class="article"> <b>語(yǔ)言基礎(chǔ)</b> </p>
<p></p>
<p class="article"><b>3.4.4 switch語(yǔ)句</b></p>
<p class="article"> 使用switch語(yǔ)句可以根據(jù)一個(gè)整型表達(dá)式有條件地執(zhí)行語(yǔ)句。下面的例程SwitchDemo，聲明了一個(gè)整型變量month，它的數(shù)值代表了月份。這個(gè)程序顯示了月份的名字，主要是根據(jù)month的數(shù)值并且使用了switch語(yǔ)句。
</p>
<p class="article"><span class="blue">public class SwitchDemo {</span></p>
<p class="article"><span class="blue"> public static void main(String[]
args) {</span></p>
<p class="article"><span class="blue"> int month = 8;</span></p>
<p class="article"><span class="blue"> switch (month) {</span></p>
<p class="article"><span class="blue"> case 1: System.out.println("January");
break;</span></p>
<p class="article"><span class="blue"> case 2: System.out.println("February");
break;</span></p>
<p class="article"><span class="blue"> case 3: System.out.println("March");
break;</span></p>
<p class="article"><span class="blue"> case 4: System.out.println("April");
break;</span></p>
<p class="article"><span class="blue"> case 5: System.out.println("May");
break;</span></p>
<p class="article"><span class="blue"> case 6: System.out.println("June");
break;</span></p>
<p class="article"><span class="blue"> case 7: System.out.println("July");
break;</span></p>
<p class="article"><span class="blue"> case 8: System.out.println("August");
break;</span></p>
<p class="article"><span class="blue"> case 9: System.out.println("September");
break;</span></p>
<p class="article"><span class="blue"> case 10: System.out.println("October");
break;</span></p>
<p class="article"><span class="blue"> case 11: System.out.println("November");
break;</span></p>
<p class="article"><span class="blue"> case 12: System.out.println("December");
break;</span></p>
<p class="article"><span class="blue"> }</span></p>
<p class="article"><span class="blue"> }</span></p>
<p class="article"><span class="blue">}</span></p>
<p class="article"> 這個(gè)switch語(yǔ)句計(jì)算它的表達(dá)式，在這個(gè)例子中是計(jì)算month的數(shù)值，然后計(jì)算適當(dāng)?shù)腸ase
語(yǔ)句。這樣，程序的輸出為：August。</p>
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