java certification study guide

294/300 3/7 22/60 Try to record "planned learning time" and "actual learning time" to see if you can improve your planning skills by the end of the semester. This work is very important and useful in learning. Time-consuming estimates of the formula: y=x+x/n, y=x-x/n, the number of training, X, Y is close.Reference: Why is it so difficult to estimate software engineering applications, software engineering estimation methods Planned

Second week 500/650 3/4 15 Third week 500/1150 4/5 14 Week Four 600/1750 5/6 15 Week Five 500/2250 6/7 9 I didn't learn much this week. Week Six 300/2350 7/8 10 Learning is still untrue, but better than last week Seventh Week 300

problems, there are many things to see the know, do not have to find a professional solution as before, but also to find a person do not know the answer to the wrong. The first one months every night to practice cheerleading, and the class of students less than a lot of study time, now finally end, must step up the pace, but also the footsteps of teachers and classmates. Learning progress Bar lines of code (new/cumulativ

(cumulative/target) Study time Estimating Learning Time Actual learning Time Important growth Goal 5000 rows 30 Articles 400 hours First week 150/150 2/2 15 Second week 500/650 3/4 15 Third week 500/1150 4/5 14 Week Four 600/17

){ switch(action){ case Action.STOP: out.println("bofangtingzhidonghua"); break; case Action.RIGHT: out.println("bofangxiangyoudonghua"); break; case Action.LEFT: out.println("bofangxiangzuodonghua"); break; case Action.UP: out.println("bofangxiangshangdonghua"); break; case Action.DOWN: out.println("bofangxiangxiadonghua"); break; default: out.println("buzhichicidongzuo");

is), and then compare the speed (read only, not output) of reading data from the file using BufferedReader with scanner, which method is fast? Intercept the test source code, the number of the study. Please analyze the reasons in detail. Tip: You can use JUNIT4 to compare run timesThis picture is cut in the school's lab, so it's not the same as other diagrams.Using BufferedReader will save the contents of the file to the memory and then read, and sca

Job 14-Databasetags (space delimited): Java1. Study summary 1.1 This week summarize anomalies in the way you like (mind mapping or other).2. Using database technology your system 2.1 briefly describes how to use the database to transform your system. What table do you want to build? The design of your watch. What are the key classes used in JDBC in the 2.2 system? 2.3 Key code for database related modules. Critical lines need to be annotated. 2.4 Sele

run times BufferedReader reading data faster than scanner BufferedReader has greater buffer memory; Scanner requires parsing of input data, which is more time consuming 4.3 character encoding 4.3.1 an existing EncodeTest.txt file that contains some Chinese, the file is encoded using UTF-8. Use FileReader and BufferedReader to read the EncodeTest.txt text into and out. Do you have garbled characters? Why does it have garbled characters? How to solve? (Key code, occurrence numbe

section of the system with the stream associated with the file? Why use these interfaces with classes? Read with classes, classes, File FileReader BufferedReader classes, files created through file objects, and the other two classes with the read. Write files are used to BufferedWriter , OutputStreamWriter , FileOutputStream . 2.3 Read and write file-related code. Key lines need to be annotated3. Code volume Statistics 3.1 Statistics The amount of code done this week selected:

Volume (Add/accumulate) Learning Time (new/cumulative) Important Growth Goal 5000 rows 30 Articles 400 hours First week 48/48 1/1 20/20 Second week 390/438 2/3 18/38 Third week 866/1304 1/4 18/56 Week Four 1105/2409 1/5 30/86 Week Five 1229/3196 1/6 20/106 W

As a Java programmer, the most painful thing is to choose a range too wide, can read too many books, often easily confused. I'd like to pick out some of the technical books I've read and recommend them to you in the order of study, especially to the Java programmers who want to keep improving their skills. First, Java

following can be a statement, because they do not.Other (sentiment, thinking, etc., optional)I thought the Java language and C language could be very different, because one is a process oriented, one is object-oriented, but after this week's study I find that the two are so similar in syntax. Because the grammar of the C language mastered the basic clearance, so I feel that this week's learning task is not

name, otherwise there will be a compilation error.Because my careless more hit a "W" led to the compilation of errors, but this episode also let me notice this knowledge point, also told me to do things carefully, because careless committed the wrong always take a lot of time to be wrong.OtherWinter vacation when patronize doings wherever other things, have not read Java, now some regret, should initially look at the

two chapters are very abstract and difficult to understand, and the code examples in the book are closely related to the previous content, because the knowledge points in the previous chapters are not thorough enough to understand the code. There is always a need to revisit the textbook to review the previous content to get a little bit of code.Learning progress Bar lines of code (new /Cumulative) Blog volume ( new/cumulative) Learning time (new/cumulative) I

second week 200/300 1/3 15/25 third week 189/489 1/4 20/45 Planned study time: 25 hours Actual learning time: 20 hours Improved situation: This week's learning content is a bit more, need to understand more places, many places the correlation needs to be more detailed analysis, using the book and video combination of methods. O

Four 320/980 1/4 14/56 Week Five 280/1260 1/5 14/70 Week Six 478/1738 2/7 16/86 Seventh Week 425/2163 2/9 16/102 Eighth Week 859/3022 3/12 16/118 Nineth Week 4482/7504 2/14 21/139 Tenth Week 1171/8675 2/16 20/159 Resources

you confirm the installation, you have a long code after entering Java using the command prompt, and you don't know what it means.Resolution: After reviewing the data, the corresponding version prompt appears after the change command is Java-version2. Issue: After installation, there are two JRE folders in the Found folderResolution process: Access to information and read the relevant blog content, learn a

use some SQL statements, learning SQL statements for the master MySQL database operation is also an important method. Because the last time did not finish the eighth chapter of the code, this time I fill in the code, the link to the code. Learning progress Bar lines of code (new/cumulative) Blog Volume (Add/accumulate) Learning Time (new/cumulative) Important Growth Goal 5000 rows 30 Articles 400 hours

question 2 and reason, understand the situation ... Pairing and mutual evaluation other (sentiment, thinking, etc., optional)XxxXxxLearning progress Bar lines of code (new/cumulative) Blog Volume (Add/accumulate) Learning Time (new/cumulative) Important Growth Goal 5000 rows 30 Articles 400 hours First week 200/200 2/2 20/20 Second week 300/500 2/4

, thinking, etc., optional) This week the study task is heavier, in the study tenth chapter, because lacks the eighth chapter knowledge, learns to be difficult, the understanding of the code is not deep enough, encounters does not understand only then forwards the corresponding knowledge point to learn the side to supplement, the efficiency is not high. ShouldAfter encountering the knowledge points