我们默认的时候创建的就是List对象,而我们如果要创建Array数组对象,就不能使用def而要声明式创建: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 String[] arrStr = ['zin', 'yan', 'com'] //例如我们创建了一个字符串数组 如果很喜欢def创建的话,我们也可以使用as关键字进行标注转换。示例如下: 代码...
list.add("1");String[] strs = (String[])list.toArray(new String[0]);System.out.println(strs[0]);而从数组转化成List对象也非常简单：def strs = ['a','b','c','d'] as String[]List list = strs.toList()println list.get(0)你也可以这样转化：def strs = ['a','b...
一、Java中如何实现数组和List之间的转换 1、概述 数组转List使用Arrays.asList()方法 List转数组使用list.toArray()方法; 2、代码演示 package...java.util.List; public class MyListTest { public static void main(String[] args) { // 1、数组转...{"大哥","二哥","三哥","四哥"}; List string...
StringWriter stringWriter = new StringWriter(); this.compiler.getTask(stringWriter, this.manager, null, null, null, list).call(); Output mc = this.manager.getOutput(name); //输出 if (mc != null) { byte[] array = mc.toByteArray(); //转换成byte[] return defineClass(name, array, 0,...
[1, 2, 3, 4, 5].get(-2)//但是get()方法不允许使用负数indexassertfalse}catch(e) {asserteinstanceofArrayIndexOutOfBoundsException } List迭代 迭代列表的元素通常是通过调用each和eachWithIndex方法,它们对列表的每个项执行代码: [1, 2, 3].each { ...
List可以使用数组调用array.toList()方法创建.数组同样可以使用list调用list.toArray()方法创建. Groovy还向java.util.List添加了一些方法. count该操作计算list中有多少个元素与给定的对象相等.[1, 2, 3, 1].count(1)返回2. immutable该操作使用java.util.Collections类的静态方法unmodifiableList创建一个集合的不...
// iterate over a list x = 0 for ( i in [0, 1, 2, 3, 4] ) { x += i } assert x == 10 // iterate over an array array = (0..4).toArray() x = 0 for ( i in array ) { x += i } assert x == 10 // iterate over a map ...
CachedMethod[] cachedMethods = (CachedMethod[])cachedMethodsList.toArray(new CachedMethod[cachedMethodsList.size()]); List<DgmMethodRecord> records = new ArrayList(); cur = 0; CachedMethod[] var20 = cachedMethods; int var8 = cachedMethods.length; ...
() def yesterday = today - 1 assert (yesterday..today).size() == 2 // 字符范围 def range3 = 'a'..'c' assert range3.contains("b") // 反向范围 def range4 = 4..<1 assert range4.toList() == [4, 3, 2] } } 参考文献 Groovy In Action · 2nd Edition Dierk König、...
class SomeBean { @IndexedProperty String[] someArray = new String[2] @IndexedProperty List someList = [] } def bean = new SomeBean() bean.setSomeArray(0, 'value') bean.setSomeList(0, 123) assert bean.someArray[0] == 'value' assert bean.someList == [123] @groovy.lang.Lazy ...