Java 类字段的默认初始化

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public class Main {  

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  byte b;

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  short s;

  /**

   from

  * 时代Java 

  **/

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  int i;

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  long l;

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  float f;

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  double d;

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  boolean bool;

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  String str;

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  public static void main(String[] args) {

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    // Create an object of DefaultInit class

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    Main obj = new Main();

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    /*来自 

     时 代 J a v a 公 众 号 - nowjava.com*/

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    // Print the default values for all instance variables

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    System.out.println("byte is initialized to " + obj.l);

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    System.out.println("short is initialized to " + obj.s);

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    System.out.println("int is initialized to " + obj.i);

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    System.out.println("long is initialized to " + obj.l);

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    System.out.println("float is initialized to " + obj.f);

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    System.out.println("double is initialized to " + obj.d);

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