The difference between print, println, and printf

Source: Internet
Author: User

the//print does not wrap and the println has a line wrap feature. Example: Uprint.javaclass uprint{

public static void Main (String arg[])
{
int i,j,k;
for (i=1;i<10;i++)
{
System.out.println ();
for (j=1;j<=i;j++)
{
K=i*j;
System.out.print (i+ "*" +j+ "=" +k+ "");
}
}
}
}


Print , Println , Printf the Difference


Related definitions:

Print: Displays the information in the Command window, and the output cursor is positioned after the last character;

Println : Displays the information in the Command window, and the output cursor is positioned at the beginning of the next line;

Printf: The information is formatted in the Command window, and the output cursor is positioned after the last character , It comes from C language, the function that produces the formatted output (from stdio.h medium);


Related differences:

Print with the Println the only difference :P rint After the output information is not wrapped, Println After the output of the message is automatically wrapped;

Print ("\ n") = Println (""), that System.out.print ("asd\n"); = System.out.println ("ASD");


Note: when copied to the output stream, these sequences cause their related actions to be displayed on devices that have this capability:

\ \ Backslash \a warning \b backspace \f page break \ n line break \ r enter \ t Jump \v vertical Jump-grid \DD D DDD is a 1, 2, or 3-bit octal number. These escape sequences are displayed as bytes with numeric values specified by the octal number.


Related Demos ( Assuming that the file is e:/a folder under ):

Print

A.java The text file reads the following code:

Class a{

public static void Main (string[] args) {

System.out.print ("a");

System.out.print ("a");

}

}


The results are as follows:

Aa


Println

B.java The text file reads the following code:

Class b{

public static void Main (string[] args) {

System.out.println ("B");

System.out.println ("B");

}

}

The results are as follows:

B

B


Printf

Type definition:

Character

Input data type

Meaning

D, I

Int

Signed 10 binary number, I is a vintage notation

O

unsigned int

Unsigned 8 binary number

U

unsigned int

Unsigned 10 binary number

X, X

unsigned int

unsigned 16 binary, x abcdef,x with abcdef to represent the number of 10~15

F

Double

Decimal

E, E

Double

Scientific notation represents the number, the case of which is denoted by the case of "E"

G, G

Double

Using the shortest form of the two above, the case is used with%e and%e

C

Char

Converts the input number to the corresponding character

S, s

char *, wchar_t *

String

P

void *

Output pointers in 16 binary form

N

int *

Until this character, the total number of characters output, do not output text

%

Do not enter

The output character "%" itself


Note:%g,%g in the number of decimal places four bits or exponent greater than equal precision with%E,%E, otherwise%f.


C.java The text file reads the following code:

Class c{

public static void Main (string[] args) {

int a = 1;

Double b = 2;

System.out.printf ("%d", a);

System.out.println ();

System.out.printf ("%f", b);

System.out.println ();

System.out.printf ("%.2f", b);

}

}


The difference between print, println, and printf

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