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File f1 = new File ("a.txt");
FileInputStream is=new FileInputStream(f1);
int i;
byte[] b =new byte[2];
while((i=is.read(b))!=-1){
System.out.print(new String(b));
}
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byte[] b =new byte[yourtxtlength];
yourtxtlengthå°±æ¯ä½ ææ¬åèçé¿åº¦
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