java:write_to_file
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| Both sides previous revision Previous revision Next revision | Previous revision Next revision Both sides next revision | ||
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java:write_to_file [2016/03/26 06:43] gthanos |
java:write_to_file [2017/02/17 11:17] gthanos [Γράφοντας σε δυαδικά αρχεία] |
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|---|---|---|---|
| Line 19: | Line 19: | ||
| public static void main(String args[]) { | public static void main(String args[]) { | ||
| double f = 754.541012; | double f = 754.541012; | ||
| - | System.out.format("The value of f is: %08.2f %n", f); | + | System.out.printf("The value of f is: %08.2f %n", f); |
| } | } | ||
| } | } | ||
| Line 87: | Line 87: | ||
| <code java CopyBinFile.java> | <code java CopyBinFile.java> | ||
| import java.io.*; | import java.io.*; | ||
| + | import java.util.*; | ||
| public class CopyBinFile { | public class CopyBinFile { | ||
| public static void main(String [] args) { | public static void main(String [] args) { | ||
| - | if (args.length < 2) { | ||
| - | System.err.println("Insufficient number of arguments!"); | ||
| - | return; | ||
| - | } | ||
| | | ||
| - | File readFile = new File(args[0]); | + | Scanner sc = new Scanner(System.in); |
| - | File writeFile = new File(args[1]); | + | System.out.print("Enter src filename: "); |
| + | String readFilename = sc.next(); | ||
| + | File readFile = new File(readFilename); | ||
| | | ||
| if( !readFile.isFile() ) { | if( !readFile.isFile() ) { | ||
| Line 106: | Line 105: | ||
| return; | return; | ||
| } | } | ||
| + | | ||
| + | System.out.print("Enter dst filename: "); | ||
| + | String writeFilename = sc.next(); | ||
| + | File writeFile = new File(writeFilename); | ||
| + | | ||
| if( writeFile.exists() ) { | if( writeFile.exists() ) { | ||
| System.err.println("Output file exists! Unable to overwrite."); | System.err.println("Output file exists! Unable to overwrite."); | ||
| Line 128: | Line 132: | ||
| </code> | </code> | ||
| + | |Προηγούμενο: [[ :java:read_from_file | Διαβάζοντας από ένα αρχείο ]] | [[ :toc | Περιεχόμενα ]] | Επόμενο: [[ :java:array_list | Η κλάση ArrayList]] | | ||
java/write_to_file.txt · Last modified: 2017/04/28 10:56 by gthanos
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