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class Test {
	public static void main(String[] args) {
 
		String a;
		String b;
 
	    Test t = new Test();
 
	    new Thread(()-> a = "hi").start();
	    new Thread(()-> b = "hello").start();
 
	    System.out.println(a);
	    System.out.println(b);
 
	}
}

Main.java:12: error: variable a might not have been initialized
	    System.out.println(a);
	                       ^
Main.java:13: error: variable b might not have been initialized
	    System.out.println(b);
	                       ^
Main.java:9: error: local variables referenced from a lambda expression must be final or effectively final
	    new Thread(()-> a = "hi").start();
	                    ^
Main.java:10: error: local variables referenced from a lambda expression must be final or effectively final
	    new Thread(()-> b = "hello").start();
	                    ^
4 errors

Standard output is empty