Java while循环变量从外部访问 [英] Java while loop variable accessing from outside

问题描述

如何从外部访问while循环中的变量?

How to access variable that is in the while loop from outside it ?

推荐答案

始终在有意义的范围内声明变量.如果要在循环内外都引用您的变量，则必须在循环外声明它.

Always declare variables at the scope that makes sense. If your variable is to be referenced both inside and outside a loop, then it must be declared outside the loop.

public String doIt() {
    StringBuilder builder = new StringBuilder();
    for (int i = 0; i < 100; i++) {
        builder.append("ponies ");
    }
    return builder.toString();
}

优良作法是缩小变量的范围，以使它们仅在需要的地方可见.

It is good practice to narrow the scope of variables so that they are only visible where they are needed.

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