Java final 关键字详解

具体如下，请看代码注释：

package com.example.demo.java;


public class FinalTest {
    private int a;
    private final int b;
    private final int c;
    private final FinalTest finalTest = new FinalTest();

    
    {
       c=10;
    }
    
    public FinalTest(){
        a = 1;
        b = 10;
    }


    public void write(){
        a = 2;
        // b = 10; //放开编译报错 final 修饰的变量如果是基本类型，值不能被改变
        //finalTest = new FinalTest(); final 修饰的变量如果是引用类型，引用地址不能被改变
        finalTest.setA(11);     //但是引用类型的属于可以被改变
    }

    private void setA(int a){
        this.a = a;
    }
    private int  getA(){
        return this.a;
    }
}