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help! string format???

help! string format???# Java - 爪哇娇娃

l*t2003-07-02 07:07

1 楼

urgent!
how to output the first 5 letters to a file from a 20-letter string?
thank you!!!

xt2003-07-02 07:07

2 楼

OutputStream out = ...;
String str = ...;
byte[] b = str.getBytes();
out.write( b, 0, 5 );

【在 l**t 的大作中提到】

: urgent!
: how to output the first 5 letters to a file from a 20-letter string?
: thank you!!!

c*t2003-07-02 07:07

3 楼

why not using substring?

【在 xt 的大作中提到】

:
: OutputStream out = ...;
: String str = ...;
: byte[] b = str.getBytes();
: out.write( b, 0, 5 );

m*c2003-07-02 07:07

4 楼

String str20 = ...;
Writer writer = new BufferedWriter(new FileWriter(new File(...)));
write.write (str20, 0, 5); // cannot remember it should 4 or 5
writer.close();

【在 c*****t 的大作中提到】

: why not using substring?

st2003-07-02 07:07

5 楼

~~~~~~~~no need to
nest one more bah.
BufferedWriter w=new BufferedWriter(new FileWriter("filename")); should work.

【在 m**c 的大作中提到】

:
: String str20 = ...;
: Writer writer = new BufferedWriter(new FileWriter(new File(...)));
: write.write (str20, 0, 5); // cannot remember it should 4 or 5
: writer.close();

c*t2003-07-02 07:07

6 楼

ffdt, use
str20.substring (0, 5)

【在 m**c 的大作中提到】

:
: String str20 = ...;
: Writer writer = new BufferedWriter(new FileWriter(new File(...)));
: write.write (str20, 0, 5); // cannot remember it should 4 or 5
: writer.close();