java编程思想程序研究不懂,望解释
第四章关于静态变量初始化顺序的程序,代码如下: class Bowl {
Bowl(int marker) {
System.out.println("Bowl(" + marker + ")");
}
void f(int marker) {
System.out.println("f(" + marker + ")");
}
}
class Table {
static Bowl b1 = new Bowl(1);
Table() {
System.out.println("Table()");
b2.f(1);
}
void f2(int marker) {
System.out.println("f2(" + marker + ")");
}
static Bowl b2 = new Bowl(2);
}
class Cupboard {
Bowl b3 = new Bowl(3);
static Bowl b4 = new Bowl(4);
Cupboard() {
System.out.println("Cupboard()");
b4.f(2);
}
void f3(int marker) {
System.out.println("f3(" + marker + ")");
}
static Bowl b5 = new Bowl(5);
}
public class StaticInitialization {
// static Test monitor = new Test();
public static void main(String[] args) {
System.out.println("Creating new Cupboard() in main");
new Cupboard();
System.out.println("Creating new Cupboard() in main");
new Cupboard();
t2.f2(1);
t3.f3(1);
/*monitor.expect(new String[] {
"Bowl(1)",
"Bowl(2)",
"Table()",
"f(1)",
"Bowl(4)",
"Bowl(5)",
"Bowl(3)",
"Cupboard()",
"f(2)",
"Creating new Cupboard() in main",
"Bowl(3)",
"Cupboard()",
"f(2)",
"Creating new Cupboard() in main",
"Bowl(3)",
"Cupboard()",
"f(2)",
"f2(1)",
"f3(1)"
});*/
}
static Table t2 = new Table();
static Cupboard t3 = new Cupboard();
} ///:~