java 经典程序三道
1、异常的题目
public class ExceptionTest {
public static boolean a() {
try {
throw new Exception();
} catch (Exception e) {
return false;
//System.out.println(e);
} finally {
System.out.println("aaa");
}
}
public static int b() {
int i=1;
try {
throw new Exception();
} catch (Exception e) {
return i;
//System.out.println(e);
} finally {
i++;
}
}
public static int c() {
int i=1;
try {
//throw new Exception();
return 1;
} catch (Exception e) {
//System.out.println(e);
} finally {
return 2;
}
}
/**
* 功能：
* 用户：李扬
* 时间：2011-10-31
* 参数：@param args
* 返回值：void
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
System.out.println(a());
System.out.println(b());
System.out.println(c());
}
}
2、构造方法：
class ConstractionTest {
public static void main(String[] args){
new A();
}
}
class A {
{ System.out.print("A");
}
static {
new B(1);
}
static B b1 = new B();
A() {
this(1);
System.out.print("B");
}
A(int i) {
System.out.print("C");
}
}
class B {
static {
System.out.print("D");
}
B() {
this(1);
System.out.print("E");
}
B(int i) {
System.out.print("F");
new A();
}
}
3、静态代码块、静态变量
public class StaticTest {
public static void main(String[] args) {
System.out.println(StaticTest.country);
System.out.println(StaticTest.province);
}
static{
country = "美国";
}
private static String country = "中国";
private static String province = "山东";
static{
province = "北京";
}
}
