* Diamond Pattern Program in Java */ importjava.util.Scanner; publicclassDiamond { publicstaticvoidmain(Stringargs[]) { intn, i, j, space=1; System.out.print("Enter the number of rows: "); Scanner s=newScanner(System.in); n=s.nextInt(); ...
Program importjava.util.Scanner;publicclassPattern2{publicstaticvoidmain(String[]args){Scanner sc=newScanner(System.in);System.out.print("Enter number of rows: ");introws=sc.nextInt();System.out.println("your pattern is: -");for(inti=1;i<=rows;i++){for(intj=1;j<=i;j++){System.o...
// Java program to Print Diamond Star Pattern // Using do-while loop // Importing input output classes import java.io.*; // Main class publicclassTechDecodeTutorials{ // Main driver method public staticvoidmain(String[]args) { // Declaring and initializing variables ...
printPattern1(rows); } } Notice that I have created a utility function for common string printing task. If you can divide your program into short reusable functions, then it shows that you are not only looking to write the program but also want to make sure of its quality and reusability...
importjava.util.Scanner;publicclassHappyProgram{publicstaticvoidmain(String args[]){Scannerinput_a=newScanner(System.in); System.out.print("Enter a number: ");intYourNumber=input_a.nextInt();if(YourNumber >10) System.out.println("Your number is greater than ten") ;if(YourNumber <=10) ...
2):临时配置方式:set path=%path%;C:\Program Files\Java\jdk\bin 特点:系统默认先去当前路径下找要执行的程序,如果没有,再去path中设置的路径下找。 classpath的配置: 1):永久配置方式:classpath=.;c:\;e:\ 2):临时配置方式:set classpath=.;c:\;e:\ ...
比如如下例子: public class ValueOfDemo { public static void main(String[] args) { // this program requires two // arguments on the command line if (args.length == 2) { // convert strings to numbers float a = (Float.valueOf(args[0])).floatValue(); float b = (Float.valueOf(args...
Program to print alphabets in javapublic class PrintAlphabets { public static void main(String args[]) { char ch; //printing uppercase alphabets System.out.println("Uppercase alphabets:"); for(ch='A';ch<='Z';ch++) System.out.print(ch + " "); //printing new line System.out.println...
Pattern; class RegExpTest { public static void main(String[] args) { String str = "北京市(朝阳区)(西城区)(海淀区)"; Pattern p = Pattern.compile(".*?(?=\\()"); Matcher m = p.matcher(str); if(m.find()) { System.out.println(m.group()); } } } 说明:上面的正则表达式中...
多次使用时,一定要用Pattern.compile(...)并缓存起来; 正则预编译 = 性能优化 + 好习惯。 5. 【强制】Java 类库中定义的可以通过预检查方式规避的 RuntimeException 异常不应该通过 catch 的方式来处理,比如:NullPointerException,IndexOutOfBoundsException 等等。