首先通过stream()方法将列表转化为流对象,再通过mapToInt()函数将流对象中的元素映射成int类型,最后通过Stream的 toArray方法转化为数组。其中mapToInt() 参数为给定的映射函数,这里表示映射到int类型。::也是java8中的操作符,表示对Integer类的intValue()方法的调用,更多的使用方式可以看官方文档。 总结 Java集合...
/*** Returns a fixed-size list backed by the specified array. (Changes to * the returned list "write through" to the array.) This method acts * as bridge between array-based and collection-based APIs, in * combination with {@linkCollection#toArray}. The returned list is * serializable ...
Returns a fixed-size list backed by the specified array. (Changes to the returned list "write through" to the array.) This method acts as bridge between array-based and collection-based APIs, in combination with Collection.toArray(). The returned list is serializable and implements RandomAccess...
* Returns a fixed-size list backed by the specified array. (Changes to * the returned list "write through" to the array.) This method acts * as bridge between array-based and collection-based APIs, in * combination with {@linkCollection#toArray}. The returned list is * serializable and ...
* as bridge between array-based and collection-based APIs, in * combination with {@link Collection#toArray}. The returned list is * serializable and implements {@link RandomAccess}. * * This method also provides a convenient way to create a fixed-size ...
In this example, we will take a string array, and convert it to List using asList() method. Java Program </> Copy import java.util.Arrays; import java.util.List; public class Example { public static void main(String[] args) {
* as bridge between array-based and collection-based APIs, in * combination with {@link Collection#toArray}. The returned list is * serializable and implements {@link RandomAccess}. * * This method also provides a convenient way to create a fixed-size ...
以下是如何在https://www.geeksforgeeks.org/arrays-aslist-method-in-java-with-examples/中使用该...
由于java.util.Arrays.asList(...)导致的异常 前言: Collections.toArray()与Arrays.asList() 是JavaAPI提供的友好的相互转换工具,日常开发中用于列表和数组之间的转换非常方便,但今天测试时,发现一下隐藏的坑。。。 Exception: terms=[此物只应天上有, 我你他, 12306,一按我帮您] Exception in thread "...
* as bridge between array-based and collection-based APIs, in * combination with {@linkCollection#toArray}. The returned list is * serializable and implements {@linkRandomAccess}. * * This method also provides a convenient way to create a fixed-size * list...