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Copy pathFileInputStreamDemo.java
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35 lines (32 loc) · 1.42 KB
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// Demonstrate FileInputStream.
import java.io.*;
class FileInputStreamDemo {
public static void main(String args[]) throws IOException {
int size;
InputStream f = new FileInputStream("FileInputStreamDemo.java");
System.out.println("Total Available Bytes: " + (size = f.available()));
int n = size / 40;
System.out.println("First " + n + " bytes of the file one read() at a time");
for (int i = 0; i < n; i++) {
System.out.print((char) f.read());
}
System.out.println("\nStill Available: " + f.available());
System.out.println("Reading the next " + n + " with one read(b[])");
byte b[] = new byte[n];
if (f.read(b) != n) {
System.err.println("couldn't read " + n + " bytes.");
}
System.out.println(new String(b, 0, n));
System.out.println("\nStill Available: " + (size = f.available()));
System.out.println("Skipping half of remaining bytes with skip()");
f.skip(size / 2);
System.out.println("Still Available: " + f.available());
System.out.println("Reading " + n / 2 + " into the end of array");
if (f.read(b, n / 2, n / 2) != n / 2) {
System.err.println("couldn't read " + n / 2 + " bytes.");
}
System.out.println(new String(b, 0, b.length));
System.out.println("\nStill Available: " + f.available());
f.close();
}
}