第八次作业
class
Z
private
String name;
private
static
int
count;
public
Person() {
count++;
this
.name =
"NONAME - "
+ count;
}
public
Person(String name) {
this
.name = name;
}
public
String getInfo() {
return
"姓名:"
+
this
.name;
}
}
public
class
Z {
public
static
void
main(String[] args) {
// TODO Auto-generated method stub
System.out.println(
new
Person1().getInfo());
System.out.println(
new
Person1(
"A"
).getInfo());
System.out.println(
new
Person1(
"B"
).getInfo());
System.out.println(
new
Person1().getInfo());
}
}
class
Person{
private
String name;
private
static
int
count;
public
Person() {
count++;
System.out.println(
"产生了"
+ count +
"个实例化"
);
}
public
String getInfo() {
return
"姓名:"
+
this
.name;
}
}
public
class
Z {
public
static
void
main(String[] args) {
// TODO Auto-generated method stub
new
Person();
new
Person();
new
Person();
new
Person();
new
Person();
}
}
class Person{ private String name; private int age; static String city = "A城"; public Person(String name,int age) { this.name = name; this.age = age; } public String getInfo() { return "姓名:" + this.name + ",年龄:" + this.age + ",城市:" + city; } } public class Z { public static void main(String[] args) { // TODO Auto-generated method stub Person per1 = new Person("张三",30); Person per2 = new Person("李四",31); Person per3 = new Person("王五",30); System.out.println("======修改信息之前======"); System.out.println(per1.getInfo()); System.out.println(per2.getInfo()); System.out.println(per3.getInfo()); System.out.println("======修改信息之后======"); Person.city = "B城"; System.out.println(per1.getInfo()); System.out.println(per2.getInfo()); System.out.println(per3.getInfo()); } }
class Single{ private static Single instance = new Single(); private Single() { } public static Single getInstance() { return instance; } public void print() { System.out.println("hello world!!!"); } } public class Z { public static void main(String[] args) { Single s = null; s = Single.getInstance(); s.print(); } }
public class Z { public static void main(String[] args) { // TODO Auto-generated method stub for (int x=0;x<args.length;x++) { System.out.println(args[x] + "、"); } } }