1. try catch. 2. throws. 這兩種方法有什么區(qū)別 第一種方法是自己處理異常. 第二種異常是把異常拋給調(diào)用這個(gè)方法的模塊去處理. 一般 Java 的庫就是怎么處理的.
http://www.o2fo.com/java_interview_question/java_interview_question-g2zu26q3.htmlHow could Java classes direct program messages to the system console, but error messages, say to a file? The class System has a variable out that represents the standard output, and the variable err that represents the standard error device. By default, they both point at the system console. This ho...
http://www.o2fo.com/java_interview_question/java_interview_question-iojp26q8.htmljava的內(nèi)存分為兩類 : - 堆內(nèi)存 heap - 棧內(nèi)存 stack stack 是指程序進(jìn)入一個(gè)方法時(shí), 會為這個(gè)方法單獨(dú)分配一塊私屬存儲空間, 用于存儲這個(gè)方法內(nèi)部的局部變量, 當(dāng)這個(gè)方法結(jié)束時(shí), 分配給這個(gè)方法的棧會釋放, 這個(gè)棧中的變量也將...
http://www.o2fo.com/java_interview_question/java_interview_question-wsf826qa.htmlHashtable是基于陳舊的Dictionary類的 HashMap是Java 1.2引進(jìn)的Map接口的一個(gè)實(shí)現(xiàn) Hashtable是線程安全的，也就是說是同步的 而HashMap是線程序不安全的，不是同步的 只有HashMap可以讓你將空值null作為一個(gè)表的條目的key或value. 但是 HashTable ...
http://www.o2fo.com/java_interview_question/java_interview_question-9e8x26qf.html...多個(gè)相同的程序代碼的線程去處理同一個(gè)資源 - 可以避免java中的單繼承的限制 - 增加程序的健壯性，代碼可以被多個(gè)線程共享，代碼和數(shù)據(jù)獨(dú)
http://www.o2fo.com/java_interview_question/java_interview_question-qy8g26ql.html...始化。 對象創(chuàng)建過程： 1. 構(gòu)造器實(shí)際上也是靜態(tài)方法。Java 解釋器首先查找類路徑定位相應(yīng) class 文件。 2. 載入 class 文件，執(zhí)行靜態(tài)初始化，靜態(tài)初始化只在類對象首次加載的適合進(jìn)行一次。 3. 使用 new 創(chuàng)建對象時(shí)首先將在堆...
http://www.o2fo.com/java_interview_question/java_interview_question-1r8a26r6.htmlA declaration declares one or more variables or methods that you can use in Java code later in the JSP file. You must declare the variable or method before you use it in the JSP file. ``` <%! declaration; [ declaration; ]+ ... %> ```
http://www.o2fo.com/java_interview_question/java_interview_question-23hu26rp.html< jsp : useBean > tag is used to use any java object in the jsp page. a) page b) request c) session d) application
http://www.o2fo.com/java_interview_question/java_interview_question-og8d26rx.htmlConversion of the JSP Page into a Java Servlet. This class is essentially a servlet class wrapped with features for JSP functionality.
http://www.o2fo.com/java_interview_question/java_interview_question-9lkh26ry.html- Jar files are intended to hold generic libraries of Java classes, resources, etc. - War files are intended to contain complete Web applications. - Ear files are intended to contain complete enterprise applications.
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1. try catch. 2. throws. 這兩種方法有什么區(qū)別 第一種方法是自己處理異常. 第二種異常是把異常拋給調(diào)用這個(gè)方法的模塊去處理. 一般 Java 的庫就是怎么處理的.
http://www.o2fo.com/java_interview_question/java_interview_question-g2zu26q3.htmlHow could Java classes direct program messages to the system console, but error messages, say to a file? The class System has a variable out that represents the standard output, and the variable err that represents the standard error device. By default, they both point at the system console. This ho...
http://www.o2fo.com/java_interview_question/java_interview_question-iojp26q8.htmljava的內(nèi)存分為兩類 : - 堆內(nèi)存 heap - 棧內(nèi)存 stack stack 是指程序進(jìn)入一個(gè)方法時(shí), 會為這個(gè)方法單獨(dú)分配一塊私屬存儲空間, 用于存儲這個(gè)方法內(nèi)部的局部變量, 當(dāng)這個(gè)方法結(jié)束時(shí), 分配給這個(gè)方法的棧會釋放, 這個(gè)棧中的變量也將...
http://www.o2fo.com/java_interview_question/java_interview_question-wsf826qa.htmlHashtable是基于陳舊的Dictionary類的 HashMap是Java 1.2引進(jìn)的Map接口的一個(gè)實(shí)現(xiàn) Hashtable是線程安全的，也就是說是同步的 而HashMap是線程序不安全的，不是同步的 只有HashMap可以讓你將空值null作為一個(gè)表的條目的key或value. 但是 HashTable ...
http://www.o2fo.com/java_interview_question/java_interview_question-9e8x26qf.html...多個(gè)相同的程序代碼的線程去處理同一個(gè)資源 - 可以避免java中的單繼承的限制 - 增加程序的健壯性，代碼可以被多個(gè)線程共享，代碼和數(shù)據(jù)獨(dú)
http://www.o2fo.com/java_interview_question/java_interview_question-qy8g26ql.html...始化。 對象創(chuàng)建過程： 1. 構(gòu)造器實(shí)際上也是靜態(tài)方法。Java 解釋器首先查找類路徑定位相應(yīng) class 文件。 2. 載入 class 文件，執(zhí)行靜態(tài)初始化，靜態(tài)初始化只在類對象首次加載的適合進(jìn)行一次。 3. 使用 new 創(chuàng)建對象時(shí)首先將在堆...
http://www.o2fo.com/java_interview_question/java_interview_question-1r8a26r6.htmlA declaration declares one or more variables or methods that you can use in Java code later in the JSP file. You must declare the variable or method before you use it in the JSP file. ``` <%! declaration; [ declaration; ]+ ... %> ```
http://www.o2fo.com/java_interview_question/java_interview_question-23hu26rp.html< jsp : useBean > tag is used to use any java object in the jsp page. a) page b) request c) session d) application
http://www.o2fo.com/java_interview_question/java_interview_question-og8d26rx.htmlConversion of the JSP Page into a Java Servlet. This class is essentially a servlet class wrapped with features for JSP functionality.
http://www.o2fo.com/java_interview_question/java_interview_question-9lkh26ry.html- Jar files are intended to hold generic libraries of Java classes, resources, etc. - War files are intended to contain complete Web applications. - Ear files are intended to contain complete enterprise applications.
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