what's program?
package zh.codegym.task.task19.task1911;
/*
Reader 包装类
*/
import java.io.*;
public class Solution {
public static TestString testString = new TestString();
public static void main(String[] args) {
PrintStream consoleStream = System.out;
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
PrintStream stream = new PrintStream(outputStream);
System.setOut(stream);
testString.printSomething();
String result = outputStream.toString();
System.setOut(consoleStream);
String upperCaseString = result.toUpperCase();
System.out.println(upperCaseString);
}
public static class TestString {
public static TestString testString;
public void printSomething() {
System.out.println("This is text for testing");
}
}
}