int[] intArray = { 1, 2, 3, 4, 5};int[] intArray2 = { 6, 7, 8, 9, 10};//Apache Commons Lang 库int[] combinedIntArray = ArrayUtils.addAll(intArray, intArray2); 5. 声明内联数组 method(newString[]{"a", "b", "c", "d", "e"}); 6. 用给定的字符串连结(join)数组 ...
* Tests {@link ArraysExt#reverse(int[])}. * The test uses an array of even length, then an array of odd length. */ @Test publicvoidtestReverse(){ int[]array=newint[]{2,4,8,10}; ArraysExt.reverse(array); assertArrayEquals(newint[]{10,8,4,2},array); array=newint[]{2,4,...
Use java.util.Arrays.toString(...) for debugging AVOID default toString(). Using the common debugging technique of printing intermediate values on the console with arrays is good, but requires calling a library method to get the results you expect. Arrays are a subclass of Object as ever othe...
9. 将一个数组转换为集(set) Java代码 Set set = new HashSet(Arrays.asList(stringArray)); System.out.println(set); //[d, e, b, c, a] 10. 逆向一个数组 Java代码 int[] intArray = { 1, 2, 3, 4, 5 }; ArrayUtils.reverse(intArray); System.out.println(Arrays.toString(intArray))...
importjava.util.Arrays;importjava.util.Comparator;publicclassArraySortReverse{publicstaticvoidmain(String[]args){// Step 1: Declare an integer arrayInteger[]arr={5,2,8,1,3};// Step 2: Use Arrays.sort method to sort the array in reverse orderArrays.sort(arr,newComparator<Integer>(){@Overr...
int[]intArray={1,2,3,4,5};ArrayUtils.reverse(intArray);System.out.println(Arrays.toString(intArray));//[5, 4, 3, 2, 1] 10. Remove element of an array int[]intArray={1,2,3,4,5};int[]removed=ArrayUtils.removeElement(intArray,3);//create a new arraySystem.out.println(Arrays....
Python Reverse Arrays - Learn how to reverse arrays in Python with simple examples. Master array manipulation techniques and enhance your programming skills.
reverse() Reverses the order of the elements of an array -- the first becomes the last, and the last becomes the first. 14 shift() Removes the first element from an array and returns that element slice. 15 slice() Extracts a section of an array and returns a new array. 16 some...
This example uses the preserve_keys argument while calling the array_reverse() method to return $a.<?php $a = array(0=>"andrew",1=>"byrne",2=>"hozier",3=>"unreal"); print_r(array_reverse($a, true)); ?> to clipboard This is the output:...
reverse().toString(); } } Math类 Math类概述 `java.lang.Math 类包含用于执行基本数学运算的方法,如初等指数、对数、平方根和三角函数。类似这样的工具类,其所有方法均为静态方法,并且不会创建对象,调用起来非常简单。 3.2 Math类常用方法 方法名 说明 Math.PI 常量,圆周率 public static double abs(double ...