/ **
* <the p-> ClassName: DataTypeTest </ the p->
* <the p-> the Description: </ the p->
* @author gangye
* @date 1:41:41 2018 Nian 12 4 afternoon
* /
{class DataTypeTest public
public static void main (String [] args) {
// boolean: true and false indicates real things, only two values, to true, to false
Boolean = In Flag to true;
Boolean = FLAG2 to false;
/ **** ************** ******** non-integral type /
@ character type
char ch = 'and'; // only single quotes assignment
using the ASCII code // assignment
char = 65 mm;
System.out.println ( "mm =" + mm);
// use unicode code assignment
char cm & lt = '\ u6211';
System.out.println ( "cm & lt uncode the code:" + cm) ;
// int
int IA = 2147483647;
// short integer
short SA =. 11;
// long
long La = 1093109470L;
// double
DA = 30.2 Double;
// single precision
a float FA = 30.2f;
System.out.println ( "int type range:" + of Integer.MIN_VALUE + "~" + Integer.MAX_VALUE);
System.out.println ( "Short Type range: "+ Short.MIN_VALUE +" ~ "+ Short.MAX_VALUE);
System.out.println (" Long range type: "of Long.MIN_VALUE + +" ~ "of Long.MAX_VALUE +);
System.out.println (" type double range: "+ Double.MIN_VALUE +" ~ "+ Double.MAX_VALUE);
System.out.println (" a float type range: "+ Float.MIN_VALUE +" ~ "+ Float.MAX_VALUE);
}
}
operation result:
{class FloatTest public
public static void main (String [] args) {
a float FA = 5.224563468328f;
System.out.println ( "FA:" + FA);
Double DA = 0.0;
// infinite
double db = Double.NEGATIVE_INFINITY;
FC = Float.NEGATIVE_INFINITY a float;
// db is equal Analyzing FC
// == number is determined using the second value are equal
System.out.println (db == FC);
System.out.println (DA / DA); // to give a number of non-
System.out.println (Float.NaN has);
System.out.println (DA / DA Float.NaN has ==); // number of two non-true results can not be obtained, the two numbers can not be compared non
System .out.println (10.0 / 0); // get positive infinity
System.out.println (10.0 / 0 == 12.0 / 0); // two positive infinite value may be equal
System.out.println (-9.0 / 0);
System.out.println (-8 / 0.0);
System.out.println (-9.0 / 0 == -. 8 / 0.0); // Likewise, two negative values may be equal to infinity
/ *
// not an integer denominator 0, otherwise thrown
System.out.println (-9/0);
* /
System.out.println ( "---------------------- ------- ");
// define positive infinity or negative infinity can Double Float Double.POSITIVE_INFINITY as the class (positive infinity) Double.POSITIVE_INFINITY as (negative infinity)
Double Double.POSITIVE_INFINITY as D1 =;
Double D2 = Double.POSITIVE_INFINITY as;
Double D3 = Double.NEGATIVE_INFINITY;
System.out.println (d1-100000000); // add any non-positive infinity or infinity infinity
System.out.println (d1 + d2); // add n plus infinity infinity or infinity
System.out.println (d1 + d3); // add positive infinity minus infinity non number
System.out.println (d1 * d2); // multiplied by the positive infinity plus infinity or positive infinity
System.out.println (d1 * d3); // positive infinity minus infinity is multiplied by negative infinity
System.out.println ( D1 / D3);
System.out.println (D1 / D2); // number of non than infinity infinity
}
}
operation result:
