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01-JAVA I/O - OverView
以下内容摘自：https://www.cnblogs.com/czwbig/p/10007201.htmlThe InputStream, OutputStream, Reader and WriterA program that needs to read data from some source needs an InputStream or a Reader. A program that needs to write data to some destination needs an Outp原创 2021-03-05 22:25:03 · 657 阅读 · 1 评论 -
Java Expcetion
The try-with-resources StatementThe try-with-resources statement is a try stament that decalres one or more resources. A resource is an object that must be closed after the program is finished with it. The try-with-resources statement ensures that each re原创 2021-03-23 17:59:40 · 261 阅读 · 0 评论 -
Java8 New feature Lambda and Stream
LambdaBefore Java 8, filtering a list of persons by a specfic name, looked like this:public List<Person> getPersonWithName(List<Person> searchList, String firstName){ List<Person> foundPersons =new LinkedList<>(); for(Person p原创 2021-03-20 17:28:44 · 182 阅读 · 0 评论 -
java-basic-IO
BASIC IOI/O StreamsByte StreamsAlways Close StreamsCharacter StreamsCharacter Stream that Use Byte StreamsLine-Oriented I/OBuffered StreamsFlushing Buffered StreamsI/O StreamsAn I/O Stream represents an input source or an output destination. A stream can原创 2021-03-16 14:19:34 · 280 阅读 · 0 评论 -
java-basic-reflection
Class NameThe fully qualified class name(including package name) is obtained using the getName() like this:Class c = new String();// obtain Calss object.String className = c.getName(); //get Name including package name.if you want the class name witho原创 2021-03-15 12:04:32 · 1250 阅读 · 1 评论 -
java-basic knowledge
IntroductionThis essay is about JavaSE basic knowledge, while I’m prepare an interview for my next job opportunity. Hence, I wrote it to review for myself. All the content is short summary from 《Core Java》, Cay S. HorstmannFinal Instacne FieldsYou c原创 2021-03-13 17:39:07 · 141 阅读 · 0 评论 -
java语言程序设计 第十版（基础篇）6.3-4
public static void main(String[] args) { // TODO Auto-generated method stub Scanner input = new Scanner(System.in); System.out.print("Enter a integer: "); int number = input.nextInt(); if...原创 2018-10-15 12:13:06 · 257 阅读 · 0 评论 -
java语言程序设计 第十版（基础篇）6.5
import java.util.Scanner;public class J6_5 { public static void main(String[] args) { // TODO Auto-generated method stub Scanner input = new Scanner(System.in); System.out.print("Enter a numb...原创 2018-10-15 12:27:37 · 243 阅读 · 0 评论 -
java语言程序设计 第十版（基础篇）6.2
public static void main(String[] args) { // TODO Auto-generated method stub Scanner input = new Scanner(System.in); System.out.print("Enter the integer"); int n = input.nextInt(); int sum ...转载 2018-10-15 11:55:53 · 209 阅读 · 0 评论 -
java语言程序设计 第十版（基础篇）6.1
public static void main(String[] args) { // TODO Auto-generated method stub Scanner input = new Scanner(System.in); System.out.print("You want to display :"); int n = input.nextInt(); int ...原创 2018-10-15 11:39:43 · 222 阅读 · 0 评论 -
Java语言程序设计（基础篇）第十版 4.6
public class J4_6 { public static void main(String[] args) { // TODO Auto-generated method stub int radius = 40; double radians = Math.random()*Math.PI*2; double x1 = radius*Math.cos(...原创 2018-09-29 13:56:18 · 286 阅读 · 0 评论 -
Java语言程序设计（基础篇）第十版 5.1
public class J5_1 { public static void main(String[] args) { // TODO Auto-generated method stub java.util.Scanner input = new java.util.Scanner(System.in); System.out.print("Enter an integer ...原创 2018-10-08 12:11:04 · 251 阅读 · 0 评论 -
Java语言程序设计（基础篇）第十版 4.5
public class J4_5 { public static void main(String[] args) { // TODO Auto-generated method stub java.util.Scanner input = new java.util.Scanner(System.in); System.out.print("Enter the numb...原创 2018-09-29 12:07:56 · 315 阅读 · 0 评论 -
Java语言程序设计（基础篇）第十版 4.4
public class J4_4 { public static void main(String[] args) { // TODO Auto-generated method stub java.util.Scanner input = new java.util.Scanner(System.in); System.out.print("Enter the side...原创 2018-09-29 11:55:11 · 181 阅读 · 0 评论 -
Java语言程序设计（基础篇）第十版 4.3（几何：估算面积）
public class J4_3 { public static void main(String[] args) { // TODO Auto-generated method stub double atlantaLatitude = 33.7490; double atlantaLongitude = 84.3880; double x1 =Math.to...原创 2018-09-29 11:21:30 · 273 阅读 · 0 评论 -
Java语言程序设计（基础篇）第十版 4.18
public class J4_18 { public static void main(String[] args) { // TODO Auto-generated method stub java.util.Scanner input = new java.util.Scanner(System.in); System.out.print("Enter two charac...原创 2018-10-07 15:10:13 · 300 阅读 · 0 评论 -
Java语言程序设计（基础篇）第十版 综合题 4.19 4.20 4.21
public class J4_19{ public static void main(String[] args) { // TODO Auto-generated method stub java.util.Scanner input = new java.util.Scanner(System.in); System.out.p...原创 2018-10-07 15:35:25 · 415 阅读 · 0 评论 -
java语言程序设计 第十版（基础篇）5.22
public class J5_22 { public static void main(String[] args) { // TODO Auto-generated method stub java.util.Scanner input = new java.util.Scanner(System.in); System.out.print("Loan Amount:")...原创 2018-10-13 22:26:21 · 320 阅读 · 0 评论 -
Java语言程序设计（基础篇）第十版 综合题4.22 4.23
public class J4_22 { public static void main(String[] args) { // TODO Auto-generated method stub java.util.Scanner input = new java.util.Scanner(System.in); System.out.print("Enter string s1"...原创 2018-10-07 16:01:15 · 395 阅读 · 0 评论 -
java语言程序设计 第十版（基础篇）5.23-26
int n = 50000; double sum1=0; double sum2=0; for(int i =1;i<=n;i++) { sum1 = sum1 + 1.0/i; } System.out.printf("result 1:%7.15f\n",sum1); for(int i=n;i>=1;i--) { sum...原创 2018-10-14 11:01:22 · 208 阅读 · 0 评论 -
java语言程序设计 第十版（基础篇）5.27
int counter1 = 0; int counter2 = 0; for(int i = 101;i<=2100;i++) { if((i%4==0 && i%100!=0)||i % 400==0) { System.out.print(i+" "); counter1++; counter2++; }...原创 2018-10-14 11:15:18 · 164 阅读 · 0 评论 -
Java语言程序设计（基础篇）第十版 4.1
public class J4_1 { public static void main(String[] args) { // TODO Auto-generated method stub java.util.Scanner input = new java.util.Scanner(System.in); System.out.print("Enter the length ...原创 2018-09-29 10:23:16 · 245 阅读 · 0 评论 -
Java语言程序设计（基础篇）第十版 4.2
public class J4_2 { public static void main(String[] args) { // TODO Auto-generated method stub java.util.Scanner input = new java.util.Scanner(System.in); System.out.print("Enter point 1 (la...原创 2018-09-29 10:41:17 · 264 阅读 · 0 评论 -
java语言程序设计 第十版（基础篇）6.6
package Learning;public class P6_6 { public static void main(String[] args) { // TODO Auto-generated method stub java.util.Scanner input = new java.util.Scanner(System.in); System.out.print(...原创 2018-10-19 16:53:21 · 201 阅读 · 0 评论 -
java语言程序设计 第十版（基础篇）6.7
public class J6_7 { final static int years = 30; public static void main(String[] args) { // TODO Auto-generated method stub java.util.Scanner input = new java.util.Scanner(System.in); Syste...原创 2018-10-19 17:14:19 · 281 阅读 · 0 评论 -
java语言程序设计 第十版（基础篇）9.3-9
9.3public class J9_3 { public static void main(String[] args) { // TODO Auto-generated method stub java.util.Date date = new java.util.Date(); for(int i =1;i&lt;=8;i++) { long time...原创 2018-11-02 17:25:02 · 829 阅读 · 2 评论 -
java语言程序设计 第十版（基础篇）7.17-21
7.17public static void main(String[] args) { // TODO Auto-generated method stub java.util.Scanner input = new java.util.Scanner(System.in); System.out.print("Enter number of students: "); int...原创 2018-10-27 17:53:45 · 388 阅读 · 0 评论 -
java语言程序设计 第十版（基础篇）7.11-16
7.11public static double deviation(double[] x) { double standardDeviation =0; double numerator=0; double mean=0; mean=mean(x); for(int i =0;i<10;i++) { numerator+=Math.pow(x...原创 2018-10-27 15:46:41 · 469 阅读 · 0 评论 -
java语言程序设计 第十版（基础篇）7.10
private final static int NUM= 10; public static int indexOfSmallestElement(double []array) { int index = 0 ; double min=100; for(int i=0;i<NUM;i++) { if(array[i]<min) { min...原创 2018-10-27 00:05:00 · 267 阅读 · 0 评论 -
java语言程序设计 第十版（基础篇）7.9
public static void main(String[] args) { // TODO Auto-generated method stub Scanner input = new Scanner(System.in); System.out.print("Enter the numbers: "); double []array = new double[10]; ...原创 2018-10-26 23:40:01 · 237 阅读 · 0 评论 -
java语言程序设计 第十版（基础篇）7.8
public static void main(String[] args) { // TODO Auto-generated method stub int []array = new int [10]; for(int i =0;i<10;i++) { array[i]= (int)(Math.random()*100); } System.out.prin...原创 2018-10-26 19:55:01 · 253 阅读 · 0 评论 -
java语言程序设计 第十版（基础篇）7.7
public static void main(String[] args) { // TODO Auto-generated method stub int []array = new int [100]; Input(array); Output(array); } public static void Input(int []array) { Scann...原创 2018-10-26 19:40:01 · 382 阅读 · 0 评论 -
java语言程序设计 第十版（基础篇）7.5
final static int NUM =10; public static void main(String[] args) { // TODO Auto-generated method stub int []array = new int [NUM]; Input(array); Output(array); } public static void Inpu...原创 2018-10-26 18:14:22 · 238 阅读 · 0 评论 -
java语言程序设计 第十版（基础篇）9..1-2
9.1public class J9_1 { public static void main(String[] args) { // TODO Auto-generated method stub Rectangle a = new Rectangle(3.5,35.9); System.out.println("width:"+a.width+" height "+a.h...原创 2018-10-29 20:52:13 · 347 阅读 · 0 评论 -
java语言程序设计 第十版（基础篇）7.2-7.4
7.3 public static void main(String[] args) { // TODO Auto-generated method stub java.util.Scanner input = new java.util.Scanner(System.in); System.out.print("Enter 10 integer"); int [] intege...原创 2018-10-21 14:58:04 · 598 阅读 · 0 评论 -
java语言程序设计 第十版（基础篇）7.1
public static void main(String[] args) { // TODO Auto-generated method stub java.util.Scanner input = new java.util.Scanner(System.in); System.out.println("Enter the number of students:"); int...原创 2018-10-21 11:18:09 · 499 阅读 · 0 评论 -
java语言程序设计 第十版（基础篇）8.1-5
8.1Scanner input = new Scanner(System.in); double [][] m = new double [3][4]; System.out.print("Enter a 3-by-4 matrix row by row"); for(int i=0;i<m.length;i++) for(int j =0;j<m[i].leng...原创 2018-10-28 11:59:37 · 714 阅读 · 0 评论 -
java语言程序设计 第十版（基础篇）6.18
public static void main(String[] args) { // TODO Auto-generated method stub Scanner input = new Scanner(System.in); System.out.print("Enter password:"); String password = input.next(); ...原创 2018-10-20 16:18:53 · 466 阅读 · 0 评论 -
java语言程序设计 第十版（基础篇）6.12-14
6.12public static void main(String[] args) { // TODO Auto-generated method stub java.util.Scanner input = new java.util.Scanner(System.in); System.out.print("Enter a character1"); String ch1 ...原创 2018-10-20 11:08:45 · 270 阅读 · 0 评论 -
java语言程序设计 第十版（基础篇）6.10
public static void main(String[] args) { System.out.println("The first 50 prime numbers are \n"); printPrimeNumbers(10000); } public static void printPrimeNumbers(int numberOfPrimes) ...原创 2018-10-19 21:54:17 · 417 阅读 · 0 评论