Why my code doesn't work? I can't see where it might be wrong :/
package com.codegym.task.task19.task1927;
/*
Contextual advertising
*/
import java.io.ByteArrayOutputStream;
import java.io.PrintStream;
public class Solution {
public static TestString testString = new TestString();
public static void main(String[] args) {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
PrintStream newps = new PrintStream(baos);
System.setOut(newps);
testString.printSomething();
System.setOut(System.out);
String[] lines = baos.toString().split("\\n");
for (int i = 0; i < lines.length; i++) {
System.out.println(lines[i]);
if (i % 2 != 0) {
System.out.println("CodeGym - online Java courses");
}
}
}
public static class TestString {
public void printSomething() {
System.out.println("first");
System.out.println("second");
System.out.println("third");
System.out.println("fourth");
System.out.println("fifth");
}
}
}
System.outis a static final variable. Because of being final you can not set it directly. For that the System class has the static methodsetOut(PrintStream). I hope you can see where this is going. In line 17 you setSystem.outtonewps. And that's why reverting to the initial value like won't work.System.outeffectively references herenewps. What you need to do is to backup the original reference of System.out, like and then use that backup variable to restore the originalSystem.outvariable.