java programming exercises for beginners

Java programming ideas personal exercises I hope you will be grateful for your criticism ......)Chapter 3 exercise 9 (1) show the maximum and minimum numbers represented by float and double indexes respectively public class MaxMinFloatDouble { /** * @param args */ public static void main(String[] args) { // TODO Auto-gen

reference type, when he is directly assigned to the value of the corresponding reference position is assigned to the string variable, so, two times the result is true. If you assign a value with the new String (), the result will be different. Write a program that simulates the result of tossing a coinPackage Net.mindview.operators;import Java.util.random;importStaticnet.mindview.util.print.*; Public classThrowcron { Public Static voidMain (string[] args) {Random num=NewRandom (); intA = Num.

Third questionPackage net.mindview.interfaces;Abstract classbase{ PublicBase () {print (); } Abstract voidprint ();} Public classTest3 extends base{Private inti =5; @Overridevoidprint () {System. out. println (i); } Public Static voidMain (string[] args) {Test3 T=NewTest3 (); T.print (); }}Output Result:0 5When calling the base class construction method, it simply allocates a chunk of memory space to the member variable of the subclass and sets the value of the memory space to the defa

JVM instance has only one heap space, and all threads share the heap;Stack: Each time a new thread JVM is started, it is assigned a Java stack, and the Java stack saves the thread's running state in frames;Stack frame: consists of local variable area, operand stack and frame data area;Local method Stack: Java programs often call local methods, local methods can

"." Location of the number - intindex = Name.lastindexof ('. ')); Wu //get the suffix of a file -String prefix =name.substring (index); About $ //The judgment must contain the "." Number, and cannot appear in the first place, with the suffix named "java" - if(Index! =-1 Index! = 0 prefix.equals (". Java")) { - - return1; A

table is not used at all. Compile with Javac, and then run it in Java. If you're using a different development environment than the JDK, learn how to compile and run it in your environment Public class javathinking { publicstaticvoid main (string[] args) { System.out.println ("Hello,world");} }Exercise 3: Find the code snippet that contains the atypename, rewrite it as a complete program, and then compile, runclass atypename{ pub

, 50); B3.setbounds (670, +, +), This.add (B1); This.add (B2); This.add (b3); This.add (JL1); This.add (JL2); This.add (JL3);} /** * Rewrite: Paint method */@Overridepublic void Paint (Graphics g) {super.paint (g); if (P1! = null P2! = null) {P1.draw (g , P1.getpoint ()-1, 2.draw (g, P2.getpoint ()-1, 425, 100);p;}}The window is a bit big ... Too lazy to adjust ...3.Package com.lovo.homework;/** * Class: Actuator? * @author Abe */public class Crapstest {public static void main (string[] args) {

("**************************"); System.out.println ("Please enter the action you have chosen:"); } Public Static voidMain (string[] args) {Carmanager cm=NewCarmanager (); Cartest CT=Newcartest (); Ct.menu (); Scanner SC=NewScanner (system.in); while(true) { intn =Sc.nextint (); Switch(n) { Case1: Cm.add (); Ct.menu (); Continue; Case2: Cm.show (); Ct.menu (); Continue; Case3: Cm.changbrand (); Ct.menu (); Continue; Case4: Cm

"; Splitting.split (regex); }}Question NinethPackage Net.mindview.strings.test9;import net.mindview.strings.Splitting;PublicClassTest9 {PublicStaticvoidMain (string[] args) {String regex ="a| e| i| o| U|a|e|i|o|u";//A case-insensitive match can also be enabled through an inline flag expression (? i). String regex1 ="(? i) a|e|i|o|u";//[ABC "denotes a or B or c String regex2 = " (? i) [Aeiou]" ; System. out.println (Splitting.knights.replaceAll (regex, " Span style= "COLOR: #800000" >_ "out.pri

floatMinfen = Fens[0]; intMinindex = 0; for(inti = 1; i ) { //Modify the minimum score if(Minfen Fens[i]) {Minfen=Fens[i]; Minindex=i; } } returnMinindex; } Public intGethightfenindex () {//Selection method: Think the first one is the lowest score floatMaxfen = Fens[0]; intMaxindex = 0; for(inti = 1; i ) { //Modify the minimum score if(Maxfen Fens[i]) {Maxfen=Fens[i]; Maxindex=i; } } returnMaxindex; }}In

Environment: Notpad + + 6.0 + JDK 6.0.31Issue: Use sockets to write client-server programs that enable client-server interaction calculations. The customer sends the length of the triangle 3 sides to the server, and the server returns the area of the computed triangle to the customer.WORKAROUND: Use Java socket programming. The client sends the data, and the server receives the data and handles it according

(String name) {THIS.name =Name }voidSetempty () {isfull =False; }voidSetfull () {isfull =True; } @OverrideProtectedvoidFinalize () {if (!Isfull) {System.OUT.PRINTLN (name +": Clean"); }//Super.finalize ();}}ClassMain {PublicStaticvoid main (string[] args) {Tank T1 = new Tank (" t1); Tank t2 = new Tank ( "t2 "); Tank t3 = new Tank ( "t3 "); T1.setfull (); T2.setempty (); T1 = nullnull; T3 = null; System.GC (); }} /** * output:t3: Cleanup T2: Clean *///:~ /span>

valueSecond, complete the main methodTips: 1, call the custom method, save the method return value in the variable maxscore 2, output variable result1 Public classHelloWorld {2 3 //complete the Main method4 Public Static voidMain (string[] args) {5 6 //Create object, object named Hello7HelloWorld Hello =NewHelloWorld ();8 9 //calling a method and saving the return value in a variableTen intMaxscore =hello.getmaxage (); One A

;//boolean b2=s1Fourth. Exercise 1: (1) write a program that prints values from 1 to 100public static void Main (string[] args) {test (100);} public static void Test (int num) {int i=0;while (iExercise 2: (2) write a program that generates 25 random numbers of type int, and for each random number, use the If-else statement to classify it as greater than, less than, or equal to a randomly generated value immediately following it.public static void Main (string[] args) {test ();} public static voi

Python core programming 2 Chapter 5 after-school exercises, python after-school exercises I have used online materials for my own exercises. The accuracy is not guaranteed. Thank you for your advice:-D. 5-1 integer: differences between a common python integer and a long integer Python has three types of integer types:

Java-based I/O Stream Integrated exercises and java-based I/O exercises 1 * byte streams include: FileInputStream and FileOutputStream ). 2 * character streams include: Character Input streams (FileReader), and FileWriter ); Byte stream> byte input stream is nothing more than reading files.

Java beginners: a few simple small programs and new beginners, java small programs Sort out several small programs written in the past few days, all of which are loop exercises.// Set N to a four-digit number, which is 9 times the reverse order number.// (For example, the in

30 FAQs for beginners of Java and FAQs for beginners of java This article answers 30 common questions for beginners of Java beginners. Can I use % to divide it by a decimal number? Is t

Java beginners-basics, java beginners- 1. java concepts Java is a simple, object-oriented, distributed, interpreted, secure, portable, and multi-threaded language with excellent performance. With its strong security, platform inde

Java beginners (1): java beginners I. Development Environment Developed Using eclipse. The procedure is as follows: Create project> src create package> package create class; II. Variables and constants 1. the keywords and identifiers cannot be named. 2. Data Type 　　 String --> String 3. Data Type Conversion Automatic: