Files
openide/java/java-tests/testData/codeInsight/daemonCodeAnalyzer/advHighlighting/StatementsBeforeSuper.java
Bas Leijdekkers b5a53393ed Java: fix bad code is green problem (IDEA-366474)
"cannot reference super before superclass constructor is called"

(cherry picked from commit a2eeb5211fed697bc99ec9620bca4493c5a7adae)

GitOrigin-RevId: 6c404d216a804825e70d5c37866e3055dc8c5443
2025-02-13 14:23:53 +00:00

178 lines
3.5 KiB
Java

import java.util.List;
class A {
int i;
A() {
<error descr="Cannot reference 'this' before superclass constructor is called">this</error>.i++; // Error
<error descr="Cannot reference 'this' before superclass constructor is called">this</error>.hashCode(); // Error
System.out.print(<error descr="Cannot reference 'this' before superclass constructor is called">this</error>); // Error
super();
}
A(int i) {}
}
class B extends A {
B() {
int i = 3;
super();
}
B(int i) {
this();
<error descr="Only one explicit constructor call allowed in constructor">super(2)</error>;
}
B(char i) {
super(4);
<error descr="Only one explicit constructor call allowed in constructor">this()</error>;
}
B(String s) {
try {
<error descr="Call to 'super()' must be top-level statement in constructor body">super(2)</error>;
}
finally {
}
}
B(String s, int i) {
{
<error descr="Call to 'super()' must be top-level statement in constructor body">super(2)</error>;
}
}
B(boolean b, int i) {
if (false) <error descr="return not allowed before 'super()' call">return;</error>
super(i);
}
void f() {
<error descr="Call to 'super()' only allowed in constructor body">super()</error>;
}
void g() {
<error descr="Call to 'this()' only allowed in constructor body">this()</error>;
}
}
class D {
int i;
}
class E extends D {
E() {
<error descr="Cannot reference 'super' before superclass constructor is called">super</error>.i++; // Error
super();
}
}
class F {
int i;
F() {
<error descr="Cannot reference 'F.i' before superclass constructor is called">i</error>++; // Error
<error descr="Cannot call 'Object.hashCode()' before superclass constructor is called">hashCode</error>(); // Error
super();
}
}
class G {
int b;
class C {
int c;
C() {
G.this.b++; // Allowed - enclosing instance
<error descr="Cannot reference 'C.this' before superclass constructor is called">C.this</error>.c++; // Error - same instance
super();
}
}
}
class Outer {
void hello() {
System.out.println("Hello");
}
class Inner {
Inner() {
hello(); // Allowed - enclosing instance method
super();
}
}
}
class Outer2 {
class Inner {
}
Outer2() {
new <error descr="Cannot reference 'Inner' before superclass constructor is called">Inner</error>(); // Error - 'this' is enclosing instance
super();
}
}
class X {
class S {
}
X() {
var tmp = new <error descr="Cannot reference 'S' before superclass constructor is called">S</error>() { }; // Error
super();
}
}
class O {
class S {
}
class U {
U() {
var tmp = new S() { }; // Allowed
super();
}
}
}
class Y {
Y(Object o) {
if (o == null) throw new NullPointerException();
super();
}
}
class Z<T> extends Y {
Z() {
super(<error descr="Cannot reference 'this' before superclass constructor is called">this</error>); // Error - refers to 'this'
}
Z(List<?> list) {
super((T)list.get(0)); // Allowed - refers to 'T' but not 'this'
}
}
record R(int x, int y) {
R(int x, int y, int z) {
if (z > 1000) throw new IllegalArgumentException();
this(x, y);
}
}
enum EE {
A, B;
EE() {
System.out.println(1);
this(1);
}
EE(int i) {}
}