Migrate Java code to separate QL repo.

java/ql/test/query-tests/UselessComparisonTest/Test.java

@@ -0,0 +1,35 @@
+class Test {
+	private int z;
+	void test(int x) {
+		z = getInt();
+		if (x < 0 || z < 0) {
+			throw new Exception();
+		}
+		int y = 0;
+		if (x >= 0) y++; // useless test due to test in line 5 being false
+		if (z >= 0) y++; // useless test due to test in line 5 being false
+		while(x >= 0) {
+			if (y < 10) {
+				z++;
+				if (y == 15) z++; // useless test due to test in line 12 being true
+				y++;
+				z--;
+			} else if (y > 7) { // useless test due to test in line 12 being false
+				y--;
+			}
+			if (!(y != 5) && z >= 0) { // z >= 0 is always true due to line 5 (and z being increasing)
+				int w = y < 3 ? 0 : 1; // useless test due to test in line 20 being true
+			}
+			x--;
+		}
+	}
+	void test2(int x) {
+		if (x != 0) {
+			int w = x == 0 ? 1 : 2; // useless test due to test in line 27 being true
+			x--;
+		} else if (x == 0) { // useless test due to test in line 27 being false
+			x++;
+		}
+	}
+	int getInt() { return 0; }
+}