### Question:
TerminalNode extends TreeNode { @Override public boolean equals(Object o) { if (!(o instanceof TerminalNode)) { return false; } TerminalNode other = (TerminalNode) o; return prediction.equals(other.prediction); } TerminalNode(String id, Prediction prediction); Prediction getPrediction(); int getCount(); void update(Example train); @Override boolean isTerminal(); @Override boolean equals(Object o); @Override int hashCode(); @Override String toString();  }### Answer:
@Test public void testEquals() { Prediction a = new NumericPrediction(1.5, 10); Prediction b = new NumericPrediction(1.5, 10); TerminalNode ta = new TerminalNode("a", a); TerminalNode tb = new TerminalNode("b", b); assertEquals(ta.hashCode(), tb.hashCode()); assertEquals(ta, tb); }