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Java中的final关键字:你以为它只是摆设?其实大有 ...
因为String的设计太重要了,万一有人乱改,整个Java世界都要乱套! 2. final修饰方法:子类禁止重写 比如你写了个支付计算方法: public final double calculatePayment () { // 核心计算逻辑} 加上final后,子类想覆盖这个方法? 门儿都没有! 特别适合那些关键算法,防止被"魔改"。
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