testbed.java

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//: TestBed.java
// Putting test code in a static inner class

class TestBed {
	TestBed() {}
	void f() { System.out.println("f()"); }
	public static class Tester {
		public static void main(String[] args) {
			TestBed t = new TestBed();
			t.f();
		}
	}
}