Admin: 1 версия

2010-06-01T06:03:58Z

1 версия

в 18:01, 31 мая 2010

2010-05-31T18:01:43Z

Новая страница

== Redirecting Standard Output, and Error ==



<source lang="java">

import java.io.FileOutputStream;
import java.io.PrintStream;
public class Main {
public static void main(String[] argv) throws Exception {
System.setOut(new LogStream(System.out, new PrintStream(new FileOutputStream("out.log"))));
System.setErr(new LogStream(System.err, new PrintStream(new FileOutputStream("err.log"))));

System.out.println("output");
System.err.println("error");
}
}
class LogStream extends PrintStream {
PrintStream out;
public LogStream(PrintStream out1, PrintStream out2) {
super(out1);
this.out = out2;
}
public void write(byte buf[], int off, int len) {
try {
super.write(buf, off, len);
out.write(buf, off, len);
} catch (Exception e) {
}
}
public void flush() {
super.flush();
out.flush();
}
}

</source>



== Redirect standard error ==



<source lang="java">

import java.io.FileOutputStream;
import java.io.PrintStream;
public class Main {
public static void main(String[] args) throws Exception {
System.setErr(new PrintStream(new FileOutputStream("system_err.txt")));
String nullString = null;
nullString = nullString.toUpperCase();
}
}

</source>



== Redirect standard output ==



<source lang="java">

import java.io.FileOutputStream;
import java.io.PrintStream;
public class Main {
public static void main(String[] args) throws Exception {
System.setOut(new PrintStream(new FileOutputStream("system_out.txt")));
System.out.println("sent to the file system_out.txt");
}
}

</source>



== Redirect standard output to a file ==



<source lang="java">

import java.io.BufferedOutputStream;
import java.io.FileOutputStream;
import java.io.PrintStream;
public class Main {
public static void main(String[] argv) throws Exception {
System.setOut(new PrintStream(new BufferedOutputStream(new FileOutputStream("output.dat"))));
}
}

</source>



== Replace standard output and error with a print stream, output to both the console and to a file. ==



<source lang="java">

import java.io.FileOutputStream;
import java.io.PrintStream;
public class Main {
public static void main(String[] argv) throws Exception {
System.setOut(new LogStream(System.out, new PrintStream(new FileOutputStream("out.log"))));
System.setErr(new LogStream(System.err, new PrintStream(new FileOutputStream("err.log"))));

System.out.println("output");
System.err.println("error");
}
}
class LogStream extends PrintStream {
PrintStream out;
public LogStream(PrintStream out1, PrintStream out2) {
super(out1);
this.out = out2;
}
public void write(byte buf[], int off, int len) {
try {
super.write(buf, off, len);
out.write(buf, off, len);
} catch (Exception e) {
}
}
public void flush() {
super.flush();
out.flush();
}
}

</source>



== Standard Err and Output Windows ==



<source lang="java">

import java.io.OutputStream;
import java.io.PrintStream;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.ScrollPaneConstants;
public class StdErrOutWindows {
JTextArea outArea = new JTextArea(20, 50), errArea = new JTextArea(20, 50);;
public StdErrOutWindows() {
JScrollPane pain = new JScrollPane(outArea);
JFrame outFrame = new JFrame("out");
outFrame.getContentPane().add(pain);
outFrame.setVisible(true);

pain = new JScrollPane(errArea);
JFrame errFrame = new JFrame("err");
errFrame.getContentPane().add(pain);
errFrame.setLocation(errFrame.getLocation().x + 20, errFrame.getLocation().y + 20);
errFrame.setVisible(true);
System.setOut(new PrintStream(new JTextAreaOutputStream(outArea)));
System.setErr(new PrintStream(new JTextAreaOutputStream(errArea)));
}
public static void main(String[] args) {
new StdErrOutWindows();
System.out.println("test to out");
try {
throw new Exception("Test exception");
} catch (Exception e) {
e.printStackTrace();
}
}
public class JTextAreaOutputStream extends OutputStream {
JTextArea ta;
public JTextAreaOutputStream(JTextArea t) {
super();
ta = t;
}
public void write(int i) {
ta.append(Character.toString((char)i));
}
public void write(char[] buf, int off, int len) {
String s = new String(buf, off, len);
ta.append(s);
}
}
}

</source>

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Java/File Input Output/Redirect - История изменений

Admin: 1 версия

в 18:01, 31 мая 2010