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<div align="center" class="title">JAVA程序員必讀：基礎(chǔ)篇(5)---類和繼承</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">［責編:爆破手］</a></div>
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<p class="article"><b><span class="article">5.1.6 </span></b><span class="article"><b>控制對類成員的訪問</b></span><b>
</b></p>
<p> <b><span class="article">（</span></b><span class="article"><b>3）Public</b></span></p>
<p class="article"> 最簡單的訪問指示是public。在任何類中、任何包中都可以訪問了的public成員。只有在外部對象使用的時候不會產(chǎn)生不良的結(jié)果的時候，才聲明為public成員。為了聲明一個public成員，你可以使用public關(guān)鍵字，如下：
</p>
<p class="article">package Greek;</p>
<p class="article">public class Alpha {</p>
<p class="article"> public int iampublic;</p>
<p class="article"> public void publicMethod() {</p>
<p class="article"> System.out.println("publicMethod");</p>
<p class="article"> }</p>
<p class="article">}</p>
<p class="article"> 現(xiàn)在，讓我們重新編寫B(tài)eta類再將它放置到不同的包中，并且要確保它跟Alpha毫無關(guān)系：
</p>
<p class="article">package Roman;</p>
<p class="article">import Greek.*;</p>
<p class="article">class Beta {</p>
<p class="article"> void accessMethod() {</p>
<p class="article"> Alpha a = new Alpha();</p>
<p class="article"> a.iampublic = 10; // legal</p>
<p class="article"> a.publicMethod(); // legal</p>
<p class="article"> }</p>
<p class="article">}</p>
<p class="article"> 從上面的代碼段你可以看出，Beta可以合法地檢查和修改在Alpha類中地iampublic變量并且可以合法地調(diào)用publicMethod。</p>
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