1 /*
 2  * @test /nodynamiccopyright/
 3  * @summary Check behavior of synzhronized key word on primitive class instances and methods.
 4  *
 5  * @compile/fail/ref=CheckSynchronized.out -XDrawDiagnostics -XDenablePrimitiveClasses CheckSynchronized.java
 6  */
 7 
 8 primitive final class CheckSynchronized implements java.io.Serializable {
 9     synchronized void foo() { // <<-- ERROR, no monitor associated with `this'
10     }
11     void goo() {
12         synchronized(this) {} // <<-- ERROR, no monitor associated with `this'
13     }
14     synchronized static void zoo(CheckSynchronized cs) { // OK, static method.
15         synchronized(cs) {    // <<-- ERROR, no monitor associated with primitive class instance.
16         }
17 
18         CheckSynchronized.ref csr = cs;
19         synchronized(csr) {
20             // Error, no identity.
21         }
22 
23         synchronized(x) {
24             // Error, no identity.
25         }
26 
27         Object o = cs;
28         synchronized(o) {
29             // Error BUT not discernible at compile time
30         }
31         java.io.Serializable jis = cs;
32         synchronized(jis) {
33             // Error BUT not discernible at compile time
34         }
35     }
36     static int x = 10;
37 
38     primitive record CheckSynchronizedRecord(int x, int y) {
39         synchronized void foo() { // <<-- ERROR, no monitor associated with `this'
40         }
41         synchronized static void zoo() { // OK, static method.
42         }
43     }
44 }