4) Read the following second main class. Guess its output. class Test { public static void main(String s[]) throws Exception { TextThread x = new TextThread ("Hello"); TextThread y = new TextThread...

Extracted text: 4) Read the following second main class. Guess its output. class Test { public static void main(String s[]) throws Exception { TextThread x = new TextThread ("Hello"); TextThread y = new TextThread ("Java"); x.start(); x.join(); y.start(); System.out.println("I am Main thread"); 5) Write it and execute it to check your previous answer.