Write java to merge two arrays, {1,2,3,4,5}{4,5,6,7,8}
Java writes two arrays to merge, {1,2,3,4,5} {4,5,6,7,8} It is divided into two steps: 1. Connect the two arrays.2. Clear duplicate elements.import java.util.Arrays; public class Combine{ public static void main(String[] args){ int a[]={1,2,3,4,5}; int b[]={ 4,5,6,7,8}; int temp[]=new int[a.length+b.length]; //Connect two arrays for(int i=0;ijava writes to merge two arrays, {1 ,2,3,4,5} {4,5,6,7,8} < How to combine java string arrays into one array in java? h3> java
java11235_Use java to calculate the sum of the 120th digit of 1,1,2,3,5,8…
Use java to calculate the sum of the numbers 1, 1, 2, 3, 5, 8… 1-20th digits Attention: 254 Answer: 4 mip version Solution time 2021-01-27 00:01 The questioner is sorry and sorry 2021-01-26 16:29 Use java to calculate 1,1,2,3,5 ,8…The sum of the 1-20th digits Best answer Second-level knowledge expert Takaki Nono 2021-01-26 16:54 public class Test1 { public static void main(String args[]) { int a[] = new int[20]; a[0] = a[1] = 1; int sum = a[0] + a[1]; for (int i = 2; i <20; i++) { a[i] = a[i – 2] + a[i – 1]; sum += a[i]; } System.out.println(” The sum of the first 20 digits is ：” + sum); } } The result is ：17710 Answer all 1F Liuli Zhishi 2021-01-26 19:27 If you observe the rules of numbers, you will know that except for the first number And the second number is unexpected, the other numbers are equal to the first 2 numbers, and I wrote a function to see if you want to see it, but I didn’t pay much attention to the function name (I am a novice) //———– ——–Function class——————————— package com.yaojian.com; public class hanshu { public int feibulaji(int n){…
Java5, 6, 7, 8, 9, 10, 11 new features
Reprinted from https://it18monkey.github.io java5 Generics List list=new ArrayList (); Enhanced for Loop int[] array = { 1, 2, 3, 4, 5}; for (int i : array) { System.out.println(i); } Autoboxing/Unboxing (Autoboxing/Unboxing). The eight basic types and their packaging classes can be automatically converted to each other. Enumeration (Typesafe Enums). ps: Enumeration is a good way to implement thread-safe singleton mode. enum TestEnum{ one, two; TestEnum() { } } Varargs Syntax: (type… arguments) The essence of variable parameters is still to use a Arrays store parameters, but Java hides this process. It should be noted that if a method declaration contains variable parameters, they must be placed in the last position. /** * Variable parameter test* * @param args */ public static void testVarargs(String… args) { //Essentially it is an array System.out.println( args[1]); for (String arg : args) { System.out.println(arg); } } Static Import. Use the static variables or methods in the class by importing the class (directly through the name, no need to add class name.), which simplifies code writing. //Single importimport static java.lang.Math.PI; //Batch importimport static java.lang.Math.*; ps: In past versions It can only be used by inheriting a class or implementing an interface. Annotations. Keyword @interface. //Annotations of…
Java programming question: The rules for a column of numbers are as follows: 1, 1, 2, 3, 5, 8, 13, 21, 34… Find the 30th digit, and implement it using a recursive algorithm
/** * The rules for a column of numbers are as follows: 1, 1, 2, 3, 5, 8, 13, 21, 34… Find the 30th digit, use recursive algorithm * */public class Test { public static void main(String[ ] args) { System.out.println(“The result is: “+Test.foo(30)); } /** * Recursive algorithm implementation */ public static int foo(int i){ if(i<=0) return 0; else if(i>0 && i<=2) return 1 ; return foo(i-1) + foo(i-2); }} The result is: 832040
Java string base conversion_Java string-based base conversion (conversion between 2, 8, 16 and 10)…
// 2，8，Convert hexadecimal to decimal Integer b = Integer.parseInt(“1001”, 2); // Convert binary to decimal Integer o = Integer.parseInt(“12”, 8);//Convert octal to decimal Integer h = Integer.parseInt(“123ABC”, 16 );//Convert hexadecimal to decimal or Integer b = Integer.valueOf(“1001”, 2); // Convert binary to decimal Integer o = Integer.valueOf(“12”, 8);//Convert octal to decimal Integer h = Integer.valueOf(“123ABC”, 16); // Convert hexadecimal to decimal or // Based on BigInteger base conversion BigInteger b = new BigInteger(“1001”, 2); // 2 in Convert octal to decimal BigInteger o = new BigInteger(“12”, 8);// Convert octal to decimal BigInteger h = new BigInteger(“123ABC”, 16);//Convert 16 to decimal //Convert 10 to 2，8，16 String tb = Integer.toBinaryString (b); // Convert decimal to binary String to = Integer.toOctalString(o); // Convert decimal to octal String th = Integer.toHexString(h);//Convert from decimal to hexadecimal or String tb = Integer.toString(b, 2); //Convert 10 to 2 System String to = Integer.toString(o, 8);//Convert decimal to octal String th = Integer.toString(h , 16);// Decimal to hexadecimal or // BigInteger-based base conversion BigInteger b = new BigInteger(“1001”, 2); //Convert binary to decimal BigInteger o = new BigInteger(“12”, 8);//Convert octal to decimal BigInteger h = new BigInteger(“123ABC”, 16);//Convert 16 to decimal String tb = b.toString(2);//Convert decimal to 2 Base…
JAVA Programming 1. (Find the rules of 1,1,2,3,5,8,13,,,,,,)
1 package FushiExam; 2 import java.util.*; 3 public class Text_1 { 4 5 public static void main( String[] args) { 6 /* 7 * There is a pair of rabbits, from From the 3rd month after birth, a pair of rabbits are born every month. After the rabbit grows to the third month 8 * Another pair is born every month. A pair of rabbits. If the rabbits do not die, what is the total number of rabbits each month? 9 * That is, find the pattern of the first n numbers: 1 1 2 3 5 8 13…10 */11 //Fibonacci sequence problem12 Scanner scan=new Scanner(System.in);13 System.out.println(” Input number: “);14 int n=scan.nextInt(); 15 int first=1,secOnd=1,next;16 System.out .println(first);17 System.out.println(second);18 for(int i=3;i<=n;i++) {19 next=first+second;20 System.out.println(next);21 first= second;22 secOnd=next;23 } 24 25 26 }27 28 }
java11235_Use java to calculate the sum of the 120th digit of 1,1,2,3,5,8…
Use java to calculate the sum of the numbers 1, 1, 2, 3, 5, 8… 1-20th digits Attention: 254 Answer: 4 mip version Solution time 2021-01-27 00:01 The questioner is sorry and sorry 2021-01-26 16:29 Use java to calculate 1,1,2,3,5 ,8…The sum of the 1-20th digits Best answer Second-level knowledge expert Takaki Nono 2021-01-26 16:54 public class Test1 { public static void main(String args[]) { int a[] = new int[20]; a[0] = a[1] = 1; int sum = a[0] + a[1]; for (int i = 2; i <20; i++) { a[i] = a[i – 2] + a[i – 1]; sum += a[i]; } System.out.println(” The sum of the first 20 digits is ：” + sum); } } The result is ：17710 Answer all 1F Liuli Zhishi 2021-01-26 19:27 If you observe the rules of numbers, you will know that except for the first number And the second number is unexpected, the other numbers are equal to the first 2 numbers, and I wrote a function to see if you want to see it, but I didn’t pay much attention to the function name (I am a novice) //———– ——–Function class——————————— package com.yaojian.com; public class hanshu { public int feibulaji(int n){…
JavaScript gets the position of the element relative to the browser ie5, 6, 7, 8, 9, 10 test passed
Each element node in the dom has a layout positioning attribute offsetLeft relative to the parent node, offsetTop getPosition: function (el) { _x = 0, _y = 0; while (el.offsetParent !== null) { _x += el.offsetLeft; _y += el.offsetTop; el = el.offsetParent; } return { x: _x, y: _y }; }
java2, 8, hexadecimal to decimal
java-2, 8, and hexadecimal to decimal Convert binary to decimal Convert octal to decimal 16 to 10 conversion mechanism Exercise 0xA45 is hexadecimal, where A is 10. The formula is as follows 516’s（1-1& #xff09;^ The 0th power of any number is 1. The result here is 5 plus 416（2-1）^ which is equal to 64 plus 10*16 The （3-1）^ is equal to 2560 Note that the 10 above is calculated according to the third digit The result is 5+ ;64+2560 = 2629
PHP base conversion example analysis (2, 8, 16, 36, 64 base to 10 base conversion)
The examples in this article describe PHP hexadecimal conversion. Share it with everyone for your reference, the details are as follows: It can be realized: Convert 10 to 2, 8, 16, 36, and 62 decimals Convert 2, 8, 16, 36, and 62 to decimal One thing to note is that when converting 2, 8, and 16, the system’s own function is used. So, no matter how high-precision conversion value is, it may be greater than 2147483646. In addition, 32 base low-precision conversion, maximum value: 2147483646;32 base high-precision conversion, maximum value: 77309411327;64 base High-precision conversion, maximum value: 133143986175. jinzhi.php file, with built-in demonstration function. Base conversion/title> 2 8 10 16 36 62 Base system Proceed NormalHigh precision Convert to 2 8 10 16 36 62 Basic, The total length is character. Note: Only decimal can be converted to 2, 8, 16, 36, 62; or reverse conversion. =10) { $zifu.= chr(($linshi+55)); }else{ $zifu.= $linshi;} break; case 62: if (($linshi>=10) && ($linshi36)) {$zifu.= chr($linshi+55);break;} if (($linshi>=36) && ($linshi62)) {$zifu.= chr($linshi+61);break;} $zifu.= $linshi;break; default: $zifu.= $linshi; break; } $shu = intval($shu/$jinzhi); } for ($i=strlen($zifu);$i$w;$i++) $zifu.=”0″; return strrev($zifu);} //Convert 2, 8, 16, 36, and 62 to decimal function jinzhih_1($zifu,$jinzhi,$w) { $shu=0; for ($i=0;$i=strlen($zifu)-1;$i++) { $linshi…
