在java中初始化一个布尔数组

initializing a boolean array in java(在java中初始化一个布尔数组)

问题描述

我有这个代码

public static Boolean freq[] = new Boolean[Global.iParameter[2]];
freq[Global.iParameter[2]] = false;

有人能告诉我我在这里到底做错了什么，我将如何纠正它?我只需要将所有数组元素初始化为 Boolean false.谢谢

could someone tell me what exactly i'm doing wrong here and how would i correct it? I just need to initialize all the array elements to Boolean false. thank you

推荐答案

我只需要将所有数组元素初始化为 Boolean false.

或者使用 boolean[] 来代替所有的值都默认为 false:

Either use boolean[] instead so that all values defaults to false:

boolean[] array = new boolean[size];

或使用 Arrays#fill() 用 Boolean.FALSE:

Boolean[] array = new Boolean[size];
Arrays.fill(array, Boolean.FALSE);

还要注意数组索引是从零开始的.freq[Global.iParameter[2]] = false; 行会导致 ArrayIndexOutOfBoundsException.要了解有关 Java 数组的更多信息，请参阅 此基本 Oracle 教程.

Also note that the array index is zero based. The freq[Global.iParameter[2]] = false; line as you've there would cause ArrayIndexOutOfBoundsException. To learn more about arrays in Java, consult this basic Oracle tutorial.

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