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);
  }

輸出結果：
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