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abstract class Person{
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private String name;
private String post;
Person(String name,String post){
this.name = name;
this.post = post;
}
public String getID(){
return (name+""+post);
}
public abstract double counting();
public void setName(String name){
this.name = name;
}
public String getName(){
return this.name;
}
public void setPost(String post){
this.post = post;
}
public String getPost(){
return this.post;
}
}
class Leader extends Person{
Leader(String name,String post){
super(name,post);
}
public double counting(){
return 3000d;
}
}
class Management extends Person{
private double basicWage=0d; //基本工资
private double allowance=0d; //津贴
Management(String name,String post){
super(name,post);
}
public void setBasicWage(double basicWage){
this.basicWage = basicWage;
}
public double getBasicWage(){
return this.basicWage;
}
public void setAllowance(double allowance){
this.allowance = allowance;
}
public double getAllowance(){
return this.allowance;
}
public double counting(){
return this.basicWage+this.allowance;
}
}
class Teacher extends Person{
private int hours; //课时
static final double ASSISTANT_STANDARD = 35.0d;//助教的课时收费标准
static final double LECTOR_STANDARD = 45.0d;//讲师的课时收费标准
static final double ANOTHER_STANDARD = 55.0d;//其他课时收费标准
Teacher (String name,String post){
super(name,post);
}
public double counting(){
double wage; //工资
if(this.getPost().equals("助教")){
wage = ASSISTANT_STANDARD*hours;
}else if(this.getPost().equals("讲师")){
wage = LECTOR_STANDARD * hours;
}else{
wage = ANOTHER_STANDARD * hours;
}
return wage;
}
public void setHours(int hours){
this.hours = hours;
}
public int getHours(){
return this.hours;
}
}
class Test {
public static void main(String [] args){
Leader leader = new Leader("张三","领导");
System.out.println(leader.getName()+"工资为:"+leader.counting());
Management manage = new Management("李四","管理人员");
manage.setBasicWage(1000d);
manage.setAllowance(500d);
System.out.println(manage.getName()+"工资为:"+manage.counting());
Teacher teacher = new Teacher("王五","助教");
teacher.setHours(50);
System.out.println(teacher.getName()+"工资为:"+teacher.counting());
Teacher teacher1 = new Teacher("赵六","讲师");
teacher1.setHours(60);
System.out.println(teacher1.getName()+"工资为:"+teacher1.counting
());
}
}
看下吧,有什么不足的请指出来
class NoLowerLetterException extends Exception {
public NoLowerLetterException(String msg) {
super(msg);
}
}
class NoDigitException extends Exception {
public NoDigitException(String msg) {
super(msg);
}
}
class People {
void printLetter(char c) {
if (c = 'a' c = 'z') {
System.out.println(c);
} else {
try {
throw new NoLowerLetterException(String.valueOf(c));
} catch (NoLowerLetterException e) {
e.printStackTrace();
}
}
}
void printDigit(char c) {
if (c = '0' c = '9') {
System.out.println(c);
} else {
try {
throw new NoDigitException(String.valueOf(c));
} catch (NoDigitException e) {
e.printStackTrace();
}
}
}
}
public class ExceptionExample {
public static void main(String args[]) {
People people = new People();
for (int i = 0; i 128; i++) {
// 【代码5】
// //将i转换为char类型，执行people.printLetter()方法，如果出现异常则捕获，并输出异常的错误信息！
people.printLetter((char) i);
}
for (int i = 0; i 128; i++) {
// 【代码6】 //将i转换为char类型，执行people. printDigit
// ()方法，如果出现异常则捕获，并输出异常的错误信息！
people.printDigit((char) i);
}
}
}
兄弟可以联系 hi留言也行
我这里保留了，从学习java第一天起到现在 学习练习代码，
基础部分注释很详细。
//每一位相加求和
public class Demo
{
public static void main(String[] args)
{
int i = 45678;
int sum = 0;
int c = 0;
for(int j = 4; j = 0; j--)
{
int b = (int) Math.pow(10, j);
c = i / b;
System.out.println(c);
sum += c;
System.out.println("sum=" + sum);
i %= b;
}
System.out.println(sum);
}
}
public class ZY1030
{
public static void main(String[] asgs)
{
zy1();
zy2();
zy3();
zy4();
zy5();
zy6();
zy7();
yanghuisanjiao();
}
public static void yanghuisanjiao()
{
int[][] pas = new int[6][];
for(int i = 0; i pas.length; i++)
{
pas[i] = new int[i + 1];
pas[i][0] = 1;
pas[i][i] = 1;
for(int j = 0; j pas[i].length - 1; j++)
{
if(j = 1 i 1)
pas[i][j] = pas[i - 1][j - 1] + pas[i - 1][j];
}
}
for(int i = 0; i pas.length; i++)
{
for(int j = 0; j pas[i].length; j++)
{
System.out.print(pas[i][j]);
System.out.println();
}
}
System.out.println();
}
private static void zy1()
{
System.out.println("��ҵ1");
/*
*
**
***
****
*****
******
*******
*/
for(int r = 0; r 7; r++)
{
for(int j = 0; j r + 1; j++)
{
System.out.print("*");
}
System.out.println();
}
}
private static void zy2()
{
System.out.println("\n��ҵ2");
/*
*
***
*****
*******
*********
*/
for(int r = 0; r = 5; r++)
{
for(int j = 0; j 11 - r; j++)
{
System.out.print(" ");
}
for(int j = 0; j r * 2 + 1; j++)
{
System.out.print("*");
}
System.out.println();
}
}
private static void zy3()
{
System.out.println("\n��ҵ3");
/*
*
* *
* * *
* * * *
* * * * *
*/
for(int r = 0; r = 5; r++)
{
for(int j = 0; j 10 - r; j++)
{
System.out.print(" ");
}
for(int j = 0; j r; j++)
{
System.out.print("* ");
}
System.out.println();
}
}
private static void zy4()
{
System.out.println("\n��ҵ4");
/*
***********
***********
***********
***********
***********
*/
for(int r = 0; r = 5; r++)
{
for(int j = 0; j 7 - r; j++)
{
System.out.print(" ");
}
for(int j = 0; j 10; j++)
{
System.out.print("*");
}
System.out.println();
}
}
private static void zy5()
{
System.out.println("\n��ҵ5");
/*
1X1=1
1X2=2 2X2=4
1X3=3 2X3=6 3X3=9
....
*/
for(int r = 1; r = 9; r++)
{
for(int j = 1; j = r; j++)
{
int iValue = j * r; //����ֵ
String str = j + "X" + r + "=" + iValue + " ";
System.out.print(str);
//System.out.print(" J:" + j);
}
System.out.println();
//System.out.println("R:" + r);
}
}
private static void zy6()
{
System.out.println("\n��ҵ6");
/*
������(����) ֻ�ܱ�1�ͱ����������������
3 5 7 11 13 17 19 23 ....
int n = 4;
boolean t = true; // assume is SU_SHU
for(int i=2; in; i++)
{
if(n%i==0)
{
t = false;
break;
}
}
System.out.println(t);
*/
for(int i = 2; i = 100; i++)
{
// if(i % 2 ==0 || i % 3 == 0 )
// {
// continue;
// }
// System.out.print(i + " ");
boolean bTrue = true;
for(int j = 2; j i; j++)
{
if(i % j == 0)
{
bTrue = false;
break;
}
}
if(bTrue)
{
System.out.println(i);
}
}
System.out.println();
}
private static void zy7()
{
System.out.println("\n��ҵ7");
/*
int n = 23623;
int x = n % 100000 / 10000;
System.out.println(x);
x = n % 10000 / 1000;
System.out.println(x);
x = n % 1000 / 100;
System.out.println(x);
*/
}
}
Shape.java接口代码
public interface Shape {
public static final double PI = 3.14d;
public double area();
}
Circle.java圆类代码
public class Circle implements Shape {
private double radius;
public Circle(double radius) {
this.radius = radius;
}
@Override
public double area() {
return PI * this.radius * this.radius;
}
public double perimeter() {
return 2 * PI * this.radius;
}
}
Cylinder.java圆柱体类代码
public class Cylinder extends Circle {
private double height;
public Cylinder(double radius, double height) {
super(radius);
this.height = height;
}
public double area() {
return 2 * super.area() + super.perimeter() * this.height;
}
public double volume() {
return super.area() * this.height;
}
}
X5_3_6.java主类代码
public class X5_3_6 {
public static void main(String[] args) {
Circle cir1 = new Circle(5);
System.out.println("圆的面积为：" + cir1.area());
System.out.println("圆的周长为：" + cir1.perimeter());
Cylinder cy1 = new Cylinder(10, 15);
System.out.println("圆柱体的表面积为：" + cy1.area());
System.out.println("圆柱体的体积为：" + cy1.volume());
}
}
上面是我写的代码，下图是执行结果，麻烦看一下，是否可以。
package threadgroup;
class ThreadDemo3 extends Thread {
private String name;
private int delay;
public ThreadDemo3(String sname, int i_delay) {
name = sname;
delay = i_delay;
}
public void run() {
try {
sleep(delay);
} catch (InterruptedException e) {
}
System.out.println("多线程测试！\n" + name + "\n" + delay);
}
}
public class testMyThread {
public static void main(String[] args) {
ThreadDemo3 th1,th2,th3;
th1 = new ThreadDemo3("线程1", (int) (Math.random() * 900));
th2 = new ThreadDemo3("线程2", (int) (Math.random() * 900));
th3 = new ThreadDemo3("线程3", (int) (Math.random() * 900));
th1.start();
th2.start();
th3.start();
}
}
package threadgroup;
public class threadDemo {
public static void main(String[] args) {
Thread t = Thread.currentThread();
t.setName("你好吗？");
System.out.println("正在进行的Thread是：" + t);
try {
for (int i = 0; i 5; i++) {
System.out.println("我不叫穆继超" + i);
Thread.sleep(3000);
}
} catch (Exception e) {
// TODO: handle exception
System.out.println("Thread has wrong" + e.getMessage());
}
}
}
package threadgroup;
public class threadDemo2 implements Runnable {
public threadDemo2() {
Thread t1 = Thread.currentThread();
t1.setName("第一个主进程");
System.out.println("正在运行" + t1);
Thread t2 = new Thread(this, "");
System.out.println("在创建一个进程");
t2.start();
try {
System.out.println("使他进入第一个睡眠状态");
Thread.sleep(2000);
} catch (InterruptedException e) {
System.out.println("Thread has wrong" + e.getMessage());
}
System.out.println("退出第一个进程");
}
public void run() {
try {
for (int i = 0; i 5; i++) {
System.out.println("进程" + i);
Thread.sleep(3000);
}
} catch (InterruptedException e) {
// TODO: handle exception
System.out.println("Thread has wrong" + e.getMessage());
}
System.out.println("退出第二个进程");
}
public static void main(String[] args) {
new threadDemo2();
}
}