关键字final应用举例-尚硅谷_佟刚_Java基础_高级类特性
关键字final应用举例public final class Test{ public static int totalNumber= 5 ; public final int id; public Test(){ id = ++totalNumber;//只能在构造方法中给final变量赋值} public static void main(String[] args) { Test t = new Test(); System.out.println(t.id); final int i = 10; final int j; j = 20; j = 30; //非法} }
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