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  • 什么是引用数据类型以及引用和基本数据类型的默认初始值

    除8种基本数据类型以外都是引用类型,实际上java中只有两种类型引用类型和原始类型(基本数据类型)....

    String是引用类型变量默认初始值是null

    String是对象,默认值是null

    对象是引用数据类型

    new String()和new String("")是申明一个空字串,不是null

    布尔型的初始值是false,char型的初始值是空格

        private int a;
        private byte b;
        private short c;
        private char d;
        private long e;
        private double f;
        private float g;
        private boolean h;
        private String string;
        
        public static void main(String[] args) {
            Inialization inialization = new Inialization();
            System.out.println("int型初始值:"+inialization.a);
            System.out.println("byte型初始值:"+inialization.b);
            System.out.println("short型初始值:"+inialization.c); 
            System.out.println("char型初始值:"+inialization.d);
            System.out.println("long型初始值:"+inialization.e);
            System.out.println("double型初始值:"+inialization.f);
            System.out.println("float型初始值:"+inialization.g);
            System.out.println("boolean型初始值:"+inialization.h);
            System.out.println("string型初始值:"+inialization.string);
            
        }
        

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  • 原文地址:https://www.cnblogs.com/lonely-buffoon/p/5569815.html
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