想知道 Java 基本資料型別最大值極限和最小值極限，寫個小程式就很容易知道。

測試 Integer, Long, Float 和 Double 的最大值和最小值，程式碼如下： 

  public static void main(String[] args)
  {
    System.out.println("Integer.MIN_VALUE = " + Integer.MIN_VALUE);
    System.out.println("Integer.MAX_VALUE = " + Integer.MAX_VALUE);

    System.out.println("Long.MIN_VALUE = " + Long.MIN_VALUE);
    System.out.println("Long.MAX_VALUE = " + Long.MAX_VALUE);

    System.out.println("Float.MIN_VALUE = " + Float.MIN_VALUE);
    System.out.println("Float.MIN_NORMAL = " + Float.MIN_NORMAL);
    System.out.println("Float.MAX_VALUE = " + Float.MAX_VALUE);

    System.out.println("Double.MAX_VALUE = " + Double.MAX_VALUE);
    System.out.println("Double.MIN_VALUE = " + Double.MIN_VALUE);
  }
 

 輸結果如下：各位自己看吧：

Integer.MIN_VALUE = -2147483648
Integer.MAX_VALUE = 2147483647
Long.MIN_VALUE = -9223372036854775808
Long.MAX_VALUE = 9223372036854775807
Float.MIN_VALUE = 1.4E-45
Float.MIN_NORMAL = 1.17549435E-38
Float.MAX_VALUE = 3.4028235E38
Double.MAX_VALUE = 1.7976931348623157E308
Double.MIN_VALUE = 4.9E-324

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