class NoLowerLetterException extends Exception {
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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++) {
// 【代碼5】
// //將i轉(zhuǎn)換為char類型，執(zhí)行people.printLetter()方法，如果出現(xiàn)異常則捕獲，并輸出異常的錯誤信息！
people.printLetter((char) i);
}
for (int i = 0; i 128; i++) {
// 【代碼6】 //將i轉(zhuǎn)換為char類型，執(zhí)行people. printDigit
// ()方法，如果出現(xiàn)異常則捕獲，并輸出異常的錯誤信息！
people.printDigit((char) i);
}
}
}
package com.date;
public class DateDome {
private int year=0;//年
private int month=0;//月
private int day=0;//日
public DateDome(int year,int month,int day){
this.year=year;
this.month=month;
this.day=day;
}
public DateDome(){
}
//年大于等于0
public boolean isYear(){
boolean suc=false;
if(year0)return suc;
else if(year=0)suc=true;
return suc;
}
//判斷月數(shù)1-12月
public boolean isMonth(){
boolean suc=false;
if(month0||month12)return false;
else suc=true;
return suc;
}
//判斷天數(shù)1-31號
public boolean isDay(){
boolean suc=false;
if(day=0||day31)return suc;
else suc=true;
return suc;
}
//是否為閏年
public boolean isRunNian(int year){
boolean suc=false;
if(year=0){
if(year%400==0||(year%4==0year%100!=0)){
suc=true;
}
}
return suc;
}
//判斷合法年月日
public boolean isInvaildate(int year,int month, int day){
boolean suc=false;
if(isYear()isMonth()isDay()){
switch(month){
case 1:
suc=true;
break;
case 2:
if(isRunNian(year)day=29){
suc=true;
}else if(day=28){
suc=true;
}
break;
case 3:
suc=true;
break;
case 4:
if(day=30)suc=true;
break;
case 5:
suc=true;
break;
case 6:
if(day=30)suc=true;
break;
case 7:
suc=true;
break;
case 8:
suc=true;
break;
case 9:
if(day=30)suc=true;
break;
case 10:
suc=true;
break;
case 11:
if(day=30)suc=true;
break;
case 12:
suc=true;
break;
}
}
return suc;
}
//根據(jù)日期得到天數(shù)
public int getDaysByDate(int year,int month,int day){
int days=0;
if(isInvaildate(year,month,day)){
for(int i=0;iyear;i++){
if(isRunNian(i)){
days+=366;
}else{
days+=365;
}
}
for(int i=1;imonth;i++){
if(i==1||i==3||i==5||i==7||i==8||i==10||i==12){
days+=31;
}else if(i==4||i==6||i==9||i==11){
days+=30;
}else if(i==2){
if(isRunNian(year)){
days+=29;
}else{
days+=28;
}
}
}
days+=day-1;
return days;
}else{
System.out.println("處理有非法日期！??！");
return -1;
}
}
//根據(jù)天數(shù)得到日期數(shù)int[]由，年、月、日組成的數(shù)組
public int[] getDateByDays(int days){
int das=0;//預(yù)計的天數(shù)
int y=0,m=1,d=1;//0年1月1號
int[] date=new int[3];
boolean suc=true;
int temp=0;
if(days0){
System.out.println("請輸入合法天數(shù)！?。?);
return new int[]{0,0,0};
}
while(suc){
if(isRunNian(y)){
temp=366;
}else{
temp=365;
}
das+=temp;
if(dasdays){
y++;
}else{
das-=temp;
break;
}
}
while(suc){
if(m==1||m==3||m==5||m==7||m==8||m==10||m==12){
temp=31;
}else if(m==4||m==6||m==9||m==11){
temp=30;
}else if(m==2){
if(isRunNian(y)){
temp=29;
}else{
temp=28;
}
}
das+=temp;
if(dasdays){
m++;
}else{
das-=temp;
break;
}
}
d=days-das+1;
date[0]=y;
date[1]=m;
date[2]=d;
return date;
}
//得到多少天前或后合法日期
public int[] addORsubDay(int dd){
int days=getDaysByDate(year,month,day);
if(days=0){
days+=dd;
if(days0){
return getDateByDays(days);
}else{
System.out.println("處理日期不能小于0年1月1號");
return new int[]{0,0,0};//代表無效日期
}
}else{
System.out.println("處理日期不能小于0年1月1號");
return new int[]{0,0,0};//年，月，日
}
}
//得到兩個日期相距天數(shù)
public int TwoDate(int[] date1,int[] date2){
int d=-1;
if(isInvaildate(date1[0],date1[1],date1[2])isInvaildate(date2[0],date2[1],date2[2])){
int days1=getDaysByDate(date1[0],date1[1],date1[2]);
int days2=getDaysByDate(date2[0],date2[1],date2[2]);
d=days1-days2;
return d=0?d:-d;
}else
{
System.out.println("處理有非法日期?。?！");
return d;
}
}
}
我寫了你提出的功能,你還可以擴(kuò)展其它功能。
public class Matriculate {
private int score=400;
public int isMatriculate(Student stu){
if (stu.getIntgretResult()=score||(stu.getIntgretResult()=300stu.getSports()=90)) {
return 1;
}else {
return 0;
}
}
public static void main(String[] args) throws Exception {
Student stu1=new Student("zhangsan",1);
stu1.setIntgretResult(400);
Student stu2=new Student("lisi",2);
stu2.setSports(85);
stu2.setIntgretResult(356);
Matriculate m=new Matriculate();
int c1=m.isMatriculate(stu1);
if (c10) {
System.out.println("id:"+stu1.getId()+"\tname:"+stu1.getName()
+"\tIntgretResult:"+stu1.getIntgretResult()+"\tsports"+stu1.getSports());
System.out.println("被錄取");
}
int c2=m.isMatriculate(stu2);
if (c20) {
System.out.println("id:"+stu2.getId()+"\tname:"+stu2.getName()
+"\tIntgretResult:"+stu2.getIntgretResult()+"\tsports"+stu2.getSports());
System.out.println("被錄取");
}
}
}
class School{
public School(){}
public School(String schoolname, double scoreLine) {
this.schoolname = schoolname;
this.scoreLine = scoreLine;
}
private String schoolname;
private double scoreLine;
public String getSchoolname() {
return schoolname;
}
public double getScoreLine() {
return scoreLine;
}
}
class Student{
public Student(){}
public Student(String name, int id) {
this.name = name;
this.id = id;
}
private String name;
private int id;
private double intgretResult;
private int sports;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public double getIntgretResult() {
return intgretResult;
}
public void setIntgretResult(double intgretResult) {
this.intgretResult = intgretResult;
}
public int getSports() {
return sports;
}
public void setSports(int sports) {
this.sports = sports;
}
}
幾年沒有碰swing了，給你詳細(xì)注釋了。仔細(xì)看。希望對你有所幫助。
import java.awt.*;//java抽象窗口工具包
import java.awt.event.*;//java抽象窗口工具包組件所激發(fā)的各類事件的接口和類
public class Test5{//類名
Frame f;//定義一個Frame窗體
TextArea center;//文本域
Label la1,la2,la3;//三個標(biāo)簽
Panel east,south,north;//三塊面板
Button b1,b2,b3,b4;//四個按鈕
Choice l1;//下拉單選框
TextField t1;//文本域
// textfield只有一行可寫
// textarea是一個區(qū)域,可以有很多行
public static void main(String[] args){//主函數(shù)，程序入口
Test mb = new Test();
mb.go();//調(diào)用go方法，初始化界面
}
private void go(){
f = new Frame("留言版程序");//標(biāo)題
f.addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent evt){
f.setVisible(false);
System.exit(0);
//System.exit(0) 0--正常結(jié)束程序 1--異常關(guān)閉程序
}
});
f.setBounds(0,0,600,400);//布局大小
f.setLayout(new BorderLayout());//顯示方式
f.setResizable(false);
//下面都將控件按鈕初始化，你懂得
north = new Panel();
south = new Panel();
east = new Panel();
center = new TextArea("留言內(nèi)容：");
center.setEditable(false);
b1 = new Button("清屏");
b2 = new Button("至頂");
b3 = new Button("至尾");
la1 = new Label("留言版");
la2 = new Label("你");
la3 = new Label(" 地說:");
t1 = new TextField(20);
b4 = new Button("提交");
l1 =new Choice();
l1.add("微笑 ");
l1.add("生氣 ");
l1.add("傷心 ");
f.add(BorderLayout.NORTH,north);//布局
f.add(BorderLayout.SOUTH,south);//布局
f.add(BorderLayout.EAST,east);//布局
f.add(BorderLayout.CENTER,center);//布局
north.add(BorderLayout.CENTER,la1);
south.add(la2);//把東西加到面板上
south.add(l1);
south.add(la3);
south.add(t1);//把東西加到面板上
south.add(b4);
east.setLayout(new GridLayout(9,0,1,10));
east.add(b1);
east.add(b2);
east.add(b3);
f.setVisible(true);//可視化
b4.addActionListener(new ActionListener(){//點(diǎn)擊提交按鈕產(chǎn)生事件
public void actionPerformed(ActionEvent e){
String text1,text2;
text1 = l1.getSelectedItem();
text2 = t1.getText();
t1.setText(null);
if(t1.getText() != ""){//將下拉單選框的內(nèi)容和你輸入在文本框的內(nèi)容顯示在中間面板上
center.append("\n");
center.append(text1);
center.append(text2);
}
}
});
b1.addActionListener(new ActionListener(){//清屏按鈕事件，只留下中間面板顯示：“留言內(nèi)容:”，其余清楚
public void actionPerformed(ActionEvent e){
center.setText("留言內(nèi)容:");
}
});
b2.addActionListener(new ActionListener(){//至頂按鈕事件，光標(biāo)焦點(diǎn)至頂
public void actionPerformed(ActionEvent e){
center.requestFocusInWindow();
center.setCaretPosition(8);
}
});
b3.addActionListener(new ActionListener(){//至尾按鈕事件，光標(biāo)焦點(diǎn)至尾
public void actionPerformed(ActionEvent e){
center.requestFocusInWindow();
center.setCaretPosition(center.getText().length());
}
});
}
}
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