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A.java

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public class A {

void f() {

Object o = new Object();

if (o == null) { } // Useless check

if (o != null) { } // Useless check

try {

new Object();

} catch(Exception e) {

if (e == null) { // Useless check

throw new Exception();

}

}

}

void g(Object o) {

if (o instanceof A) {

A a = (A)o;

if (a != null) { // Useless check

throw new Exception();

}

}

}

interface I {

A get();

}

I h() {

final A x = this;

return () -> {

if (x != null) { // Useless check

return x;

}

return new A();

};

}

Object f2(Object x) {

if (x == null) {

return this != null ? this : null; // Useless check

}

if (x != null) { // Useless check

return x;

}

return null;

}

private final Object finalObj = new Object();

public void ex12() {

finalObj.hashCode();

if (finalObj != null) { // Useless check

finalObj.hashCode();

}

}

}