35 lines
1015 B
Java
35 lines
1015 B
Java
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Read Only file
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import java.io.*;
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public class ReadOnly {
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public static void main(String[] a) throws IOException {
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File f = new File("f");
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if (!f.createNewFile()) {
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System.out.println("Can't create new file.");
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return;
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}
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if (!f.canWrite()) {
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System.out.println("Can't write new file!");
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return;
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}
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if (!f.setReadOnly()) {
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System.out.println("Grrr! Can't set file read-only.");
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return;
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}
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if (f.canWrite()) {
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System.out.println("Most immutable, captain!");
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System.out.println("But it still says canWrite() after setReadOnly");
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return;
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} else {
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System.out.println("Logical, captain!");
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System.out.println("canWrite() correctly returns false after setReadOnly");
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}
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}
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}
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