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java:io:printstream:format [2013/04/15 08:13] 88.75.134.113 |
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); | ||
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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 ===== | ||
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String string = "hey"; | String string = "hey"; | ||
- | System.out.format("%-10s reserve 10 signs on the left side\n", string ); | + | System.out.format("%-10s reserve 10 signs on the right side\n", string ); |
- | System.out.format("%20s 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 after the number \n", i ); | + | System.out.format("%10d reserve 10 signs for the number \n", i ); |
- | System.out.format("%+d print math signs \n", i ); // prints the vorzeichen | + | 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("%010d reserve 10 places and fill it with 0\n", i ); | ||
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The answer is probably 42 and not 42,12 | The answer is probably 42 and not 42,12 | ||
also not 42,12 | also not 42,12 | ||
- | hey reserve 10 signs on the left side | + | hey reserve 10 signs on the right side |
- | hey reserve 10 signs on the right side | + | hey reserve 10 signs on the left side |
- | 42 reserve 10 signs after the number | + | 42 reserve 10 signs for the number |
+42 print math signs | +42 print math signs | ||
0000000042 reserve 10 places and fill it with 0 | 0000000042 reserve 10 places and fill it with 0 |