java:io:printstream:format
Differences
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java:io:printstream:format [2012/11/23 13:46] 127.0.0.1 external edit |
java:io:printstream:format [2024/02/16 01:12] (current) |
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| ====== format ====== | ====== format ====== | ||
| format args to the format string format and write the result to the stream | format args to the format string format and write the result to the stream | ||
| - | |||
| <code java> | <code java> | ||
| format(String format, Object... args); | format(String format, Object... args); | ||
| Line 8: | Line 7: | ||
| return value: stream | return value: stream | ||
| </code> | </code> | ||
| + | |||
| + | ^ sign ^ Description ^ | ||
| + | |0 |if the place is not busy they prints a 0 | | ||
| + | |# |if the place is not busy they prints nothing | | ||
| + | |. |decimal separator Separates and decimal places. | | ||
| + | |, |Groups the numbers (a group is as large as the distance from "," to "."). | | ||
| + | |; |Delimiter. To the left of the pattern is positive, the right for negative numbers. | | ||
| + | |- |The default character for the negative prefix | | ||
| + | |% |The number is multiplied by 100 and reported as a percentage. | | ||
| + | |% % (without the space )|Just like %, with only thousandths. | | ||
| + | |\uXXXX |unicode XXXX stands for Numbers and chars like \u20B3 | | ||
| + | |' |Masking of special symbols in the prefix or suffix | | ||
| + | |%n |new line | | ||
| + | |%b |Boolean | | ||
| + | |%% |Percent | | ||
| + | |%s |String | | ||
| + | |%c |Unicode-Char | | ||
| + | |%d |decimaldigit | | ||
| + | |%x |hexadecimal | | ||
| + | |%t |Date / Time | | ||
| + | |%f |Float | | ||
| + | |%e |scientific notation | | ||
| + | |||
| ===== Language Example ===== | ===== Language Example ===== | ||
| <code java> | <code java> | ||
| + | package codereferececomjava; | ||
| + | |||
| + | public class CodeRefereceComJava { | ||
| - | String strout = null; | ||
| - | String str = "is the answer"; | ||
| - | int i = 42; | ||
| - | String[] args = { "way", "example" }; | ||
| - | strout = String.format("%d %s", i, str); | + | public static void main(String[] args) { |
| - | System.out.println(strout); | + | |
| + | String strout = null; | ||
| + | String str = "is the answer"; | ||
| + | int i = 42; | ||
| + | String[] arguments = { "way", "example" }; | ||
| + | |||
| + | strout = String.format("%d %s", i, str); | ||
| + | System.out.println(strout); | ||
| + | |||
| + | strout = String.format( "this is another %s for this %s.\n", arguments ); | ||
| + | System.out.println(strout); | ||
| + | |||
| + | double ans = 42.1234568; | ||
| + | |||
| + | System.out.format("The answer is probably %.0f", ans); | ||
| + | System.out.format("\t and not %.2f \n", ans); | ||
| + | System.out.format("also not %1.2f \n", ans); // prints 1 | ||
| + | |||
| + | |||
| + | String string = "hey"; | ||
| + | System.out.format("%-10s reserve 10 signs on the right side\n", string ); | ||
| + | System.out.format("%20s reserve 10 signs on the left side\n", string ); | ||
| + | |||
| + | System.out.format("%10d reserve 10 signs for the number \n", i ); | ||
| + | System.out.format("%+d print math signs \n", i ); // print math signs | ||
| + | System.out.format("%010d reserve 10 places and fill it with 0\n", i ); | ||
| + | |||
| + | System.out.format("%,2.3f special character \n", ans ); | ||
| + | |||
| + | |||
| + | } | ||
| + | } | ||
| - | strout = String.format( "this is another %s for this %s.", args ); | ||
| - | System.out.println(strout); | ||
| - | |||
| </code> | </code> | ||
| ==== output ==== | ==== output ==== | ||
| - | 42 is the answer | + | The answer is probably 42 and not 42,12 |
| - | this is another way for this example. | + | also not 42,12 |
| + | hey reserve 10 signs on the right side | ||
| + | hey reserve 10 signs on the left side | ||
| + | 42 reserve 10 signs for the number | ||
| + | +42 print math signs | ||
| + | 0000000042 reserve 10 places and fill it with 0 | ||
| + | 42,123 special character | ||
| + | |||
| + | ===== 2nd format example in java ===== | ||
| + | <code java> | ||
| + | package codereferececomjava; | ||
| + | |||
| + | public class CodeRefereceComJava { | ||
| + | |||
| + | |||
| + | public static void main(String[] args) { | ||
| + | int dnumber = - 5; | ||
| + | double fnumber = 12317.27; | ||
| + | String str = "Number"; | ||
| + | char ch = 'A'; | ||
| + | System.out.format("%-30s : %-+10d : %c : %,15.1f\n", str, dnumber, ch, fnumber); | ||
| + | } | ||
| + | } | ||
| + | |||
| + | |||
| + | </code> | ||
| + | |||
| + | === output of 2nd format example === | ||
| + | Number : -5 : A : 12.317,3 | ||
on the occasion of the current invasion of Russia in Ukraine
java/io/printstream/format.1353674793.txt · Last modified: 2024/02/16 01:11 (external edit)
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