java clinit 死锁

public class StaticInit {
public static void main(String[] arg) {
Thread th1 = new Thread(new Runnable() {
public void run() {
System.out.println(B.bStr);
}
}, "call-bStr");

Thread th2 = new Thread(new Runnable() {
public void run() {
System.out.println(C.cStr);
}
}, "call-cStr");
th1.start();
th2.start();
}
}

class B {
static {
try {
System.out.println("Binit start");
Thread.sleep(1000);
} catch (InterruptedException ex) {
}
System.out.println("b->cStr " + C.cStr);
}
static String bStr = "bStr";
}

class C {
static {
try {
System.out.println("Cinit start");
Thread.sleep(1000);
} catch (InterruptedException ex) {
}
System.out.println("c->b.bStr " + B.bStr);
}
static String cStr = "cStr";
}

"call-cStr" prio=6 tid=0x0257cc00 nid=0x18a4 in Object.wait() [0x04c3f000]
java.lang.Thread.State: RUNNABLE
at C.<clinit>(StaticInit.java:40)
at StaticInit$2.run(StaticInit.java:13)
at java.lang.Thread.run(Thread.java:662)

"call-bStr" prio=6 tid=0x0257a400 nid=0x1ddc in Object.wait() [0x04baf000]
java.lang.Thread.State: RUNNABLE
at B.<clinit>(StaticInit.java:28)
at StaticInit$1.run(StaticInit.java:7)
at java.lang.Thread.run(Thread.java:662)