Java final modifier: final modifier attribute, final modifier method and final modifier class
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Java
1. Final modifies the attributes in the class
2. Methods in final modifier class
3. Final modifier class
Example 1
public class FinalTest { final int count = 1; public int updateCount() { count = 4; // 修改final属性值,提示错误 return count; } public final int sum() { int number = count+10; return number; } }
public class FinalExtendTest extends FinalTest { public int sum(){}; // 重写父类 FinalTest 中的 sum()方法,出错 int count = sum(); // 继承父类 FinalTest 中的 sum()方法 }
public static void main(String[] args) { FinalExtendTest fet = new FinalExtendtest(); System.out.println(fet.count); }
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