第 57 条：将局部变量的作用域最小化
作者:
综合楼 | 来源:发表于
2021-06-01 23:51 被阅读0次
将局部变量的作用域最小化.jpeg
Iterator<Element> i = c.iterator();
while (i.hasNext()) {
doSomething(i.next());
}
...
Iterator<Element> i2 = c2.iterator();
while (i.hasNext()) { // BUG!
doSomethingElse(i2.next());
}
for (Iterator<Element> i = c.iterator(); i.hasNext(); ) {
Element e = i.next();
... // Do something with e and i
}
...
// Compile-time error - cannot find symbol i
for (Iterator<Element> i2 = c2.iterator(); i.hasNext(); ) {
Element e2 = i2.next();
... // Do something with e2 and i2
}
本文标题：第 57 条：将局部变量的作用域最小化
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