posted on 2009-12-26 02:40 funja 閱讀(11569) 評論(27) 編輯 收藏
class test{ static int x=5; static{x+=10;} public static viod main (String args[]){ System.out.println('x='+x) } statilc{x=x-5;} } 回復 更多評論
public static int mcCarthy(int n) { if (n > 100) return n - 10; else return mcCarthy(mcCarthy(n+11)); } 回復 更多評論
學習java 回復 更多評論
希望對我有用 回復 更多評論
//需求：用switch語句實現(xiàn)四季的選擇 class SwitchDemo { public static void main(String[] args) { int i=7; switch (i) { case 3: case 4: case 5: System.out.println(i+"春季"); break; case 6: case 7: case 8: System.out.println(i+"夏季"); break; case 9: case 10: case 11: System.out.println(i+"秋季"); break; case 12: case 1: case 2: System.out.println(i+"冬季"); } } } 回復 更多評論
class test{ String s = "Hello"; public static viod main (String args[]){ String[] str = s.split("A"); System.out.println(str); } } 回復 更多評論
class SwitchDemo { public static void main(String[] args) { int i=7; switch (i) { case 3: case 4: case 5: System.out.println(i+"春季"); break; case 6: case 7: case 8: System.out.println(i+"夏季"); break; case 9: case 10: case 11: System.out.println(i+"秋季"); break; case 12: case 1: case 2: System.out.println(i+"冬季"); } } } 回復 更多評論
int a; 回復 更多評論
修改JEMail應用程序包括一個明確的按鈕,用戶可以單擊隨時清除“;”、“主題;”、“消息;”字段。保存文件為JEMail2.java 回復 更多評論
public class Test{ publilc static void main(String[] args){ System.out.print("i love you"); }} 回復 更多評論
class A{ public static int a1; public int a2;}public class Test{ public static void main(String[] args){ A t1=new A(); t1.a1=4; t1.a2=5; A t2=new A(); t2.a1=6; t2.a2=7; System.out.println(t1.a1+","+t1.a2); System.out.println(t2.a1+","+t2.a2); } } 回復 更多評論
public class Main { System.out.println("######## ## ## ## ## ###### ###### ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## # ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ####### ###### ######"); } 回復 更多評論
public class Test { int x, y; Test(int x, int y) { this.x = x; this.y = y; } public static void main(String[] args) { Test pt1, pt2; pt1 = new Test(3, 3); pt2 = new Test(4, 4); System.out.print(pt1.x + pt2.x); }} 回復 更多評論
public class Test {public static void main(String[] args){System.out.println("abcdefg");}} 回復 更多評論
Packagepublic class Name{ /*自己的介紹*/ public static void main(String[]args){ System.out.print("你好，我是青鳥學員\n";); System.out.print("姓名：愛編程"); System.out.print（"年齡：20歲"）; System.out.print（"愛好:打籃球"）; }} 回復 更多評論
class Course //定義課程類{ private int code; //設(shè)置課程代碼屬性 private String name; //設(shè)置課程名稱屬性 private int time; //設(shè)置學時屬性 private int credit; //設(shè)置學分屬性 private String classification; //設(shè)置課程類別屬性 int getCode() //獲取課程代碼 { return code; } void setCode(int code) //設(shè)置課程代碼 { this.code=code; } String getName() //獲取課程名稱 { return name; } void setName(String name) //設(shè)置課程名稱 { this.name=name; } int getTime() //獲取學時 { return time; } void setTime(int time) //設(shè)置學時 { this.time=time; } int getCredit() //獲取學分 { return credit; } void setCredit(int credit) //設(shè)置學分 { this.credit=credit; } String getClassification() //獲取課程類別 { return classification; } void setClassification(String classification) //設(shè)置課程類別 { this.classification=classification; } public static void main(String [] args) //主函數(shù)測試 { Course course1=new Course(); //課程1測試 course1.setCode(1101); course1.setName("毛概"); course1.setTime(70); course1.setCredit(6); course1.setClassification("社會主義"); System.out.println("課程代碼："+course1.getCode()); //課程1打印輸出 System.out.println("課程名稱："+course1.getName()); System.out.println("課程類別："+course1.getClassification()); System.out.println("學時："+course1.getTime()); System.out.println("學分："+course1.getCredit()); System.out.println("\n"); Course course2=new Course(); //課程2測試 course2.setCode(0420); course2.setName("思修"); course2.setTime(60); course2.setCredit(4); course2.setClassification("社會主義"); System.out.println("課程代碼："+course2.getCode()); //課程2打印輸出 System.out.println("課程名稱："+course2.getName()); System.out.println("課程類別："+course2.getClassification()); System.out.println("學時："+course2.getTime()); System.out.println("學分："+course2.getCredit()); }} 回復 更多評論
小明左，右手中分別拿著兩張牌：黑桃10和紅桃8.現(xiàn)在交換手中的牌，用程序模擬這一個過程；兩個整數(shù)分別保存在兩個變量中，講著兩個變量的值互換，并輸出互換后的結(jié)果。 回復 更多評論
定義一個類Students，繼承自類Person，新增成員變量StdNo（學號），重寫成員方法ShowName，顯示當前學生的“學號+姓名”。 回復 更多評論
public class A{ public static void main(String args[]) { String s1="java"; String s2="JavA"; System.out.println(s1.compareTo(s2)); System.out.println(s1.compareToIgnoreCase(s2)); }} 回復 更多評論
public class TestOnline {public static void main(String[] args){System.out.println("TestOnline ");} 回復 更多評論
public class Hello{public static void main(String []args){System.out.printIn("Hello world");}} 回復 更多評論
import jsva.util.Scanner;import java.util.*;public class ProductCodes { public static void main(String[] args) { String code; char zone; int district,valid=0,banned=0; Scanner scan=new Scanner (System.in); System.out.print("Enter product code (XXX to quit):"); code=scan.nextLine(); while(!(code.equals("XXX"))) { try { zone=code.charAt(9); district=Integer.parseInt(code.substring(3,7)); valid++; if(zone=='R'&&district>2000) banned++; } catch(StringIndexOutOfBoundsException exception) { System.out.println("Improper code length: "+code); } catch(NumberFormatException exception) { System.out.println("District is not numeric:"+code); } System.out.print("Enter product code (XXX to quit):"); code=scan.nextLine(); } System.out.println("# of valid codes entered:"+valid); System.out.println("# of banned codes entered:"+banned); }} 回復 更多評論
public class Main{ public static void main(String[] args){ int A=3; int B=2; System.out.println("3 + 2 = "+(A+B)); System.out.println("3 - 2 = "+(A-B)); System.out.println("3 * 2 = "+(A*B)); System.out.println("3 / 2 = "+(A/B)); }} 回復 更多評論
public class People {private int number;private String name;private String sex;private int age;public People(){}public People(int number,String name,String sex,int age){this.name=name;this.age=age;this.number=number;this.sex=sex;}public int getNumber() {return number;}public void setNumber(int number) {this.number = number;}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getSex() {return sex;}public void setSex(String sex) {this.sex = sex;}public int getAge() {return age;}public void setAge(int age) {this.age = age;}public static void main(String []ad){People pp= new People(001,"張三","男",23);System.out.println("編號："+pp.getNumber());System.out.println("名字："+pp.getName());System.out.println("年齡："+pp.getAge());System.out.println("性別："+pp.getSex());}} 回復 更多評論
class Main{ public static void main (String[] args) { Fuck f = new Fuck(); Thread t = new Thread(f); t.start(); }}class Fuck implements Runnable{ public void run(){ while(true){ System.out.println("fuck"); } }} 回復 更多評論
import java.io.BufferedOutputStream;import java.io.File;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.FileReader;import java.io.IOException;import java.io.PrintWriter;import java.util.Scanner;public class AddList { private String filePath = ""; private String bakPath = ""; private String content = ""; Scanner sc = new Scanner(System.in); public String readFile(){ content = ""; if (isNull(filePath)) { System.out.println("文件存儲路徑："); filePath = sc.nextLine(); } File file = new File(filePath); FileReader fr = null; try { if (file.exists()) { fr = new FileReader(file); char[] chars = new char[1024]; int n = 0; while((n = fr.read(chars)) != -1){ String string = new String(chars, 0, n); content = content + string; } } else { System.out.println("文件不存在"); } } catch (Exception e) { e.printStackTrace(); } finally { if (fr != null) { try { fr.close(); } catch (IOException e) { e.printStackTrace(); } } } return content; } public void writeFile(String path){ File file = new File(path); FileOutputStream fos = null; mkDirs(path); try { fos = new FileOutputStream(file); BufferedOutputStream bos = new BufferedOutputStream(fos); PrintWriter pw = new PrintWriter(bos, true); pw.print(content); pw.flush(); } catch (FileNotFoundException e) { e.printStackTrace(); } finally { if (fos != null) { try { fos.close(); } catch (IOException e) { e.printStackTrace(); } } } } public void writeFile(){ if (isNull(filePath)) { System.out.println("文件存儲路徑："); filePath = sc.nextLine(); } File file = new File(filePath); FileOutputStream fos = null; mkDirs(filePath); try { fos = new FileOutputStream(file); BufferedOutputStream bos = new BufferedOutputStream(fos); PrintWriter pw = new PrintWriter(bos, true); pw.print(content); pw.flush(); } catch (FileNotFoundException e) { e.printStackTrace(); } finally { if (fos != null) { try { fos.close(); } catch (IOException e) { e.printStackTrace(); } } } } public void mkDirs(String filepath){ if (filepath.indexOf("\\") != -1) { filepath = filepath.replaceAll("\\", "/"); } int n = filepath.indexOf("//"); String path = filepath.substring(0, n) + "//"; filepath = filepath.substring(filepath.indexOf("//") + 1, filepath.length()); String[] files = filepath.split("/"); for (int i = 0; i < files.length - 1; i++) { path = path + files[i]; File file = new File(path); if (!file.exists()) { file.mkdir(); } } } public void addImfor(){ System.out.println("--------增加記錄---------"); String name = ""; String tel = ""; String email = ""; content = readFile(); while(true){ System.out.println("姓名："); name = sc.next(); System.out.println("電話："); tel = sc.next(); System.out.println("Email："); email = sc.next(); content = content + name + "<>" + tel + "<>" + email +"<==>"; System.out.println("0、Exit 1、繼續(xù)"); int i = sc.nextInt(); if (i == 0) { break; } } writeFile(); } public void deleteImfor(){ System.out.println("---------刪除記錄---------"); String name = ""; String[] imfors = null; content = readFile(); while(true){ System.out.println("你要刪除的姓名是："); name = sc.next(); if (content.indexOf(name) != -1) { imfors = content.split("<==>"); for (int i = 0; i < imfors.length; i++) { if (imfors[i].indexOf(name) != -1) { imfors[i] = ""; } } 回復 更多評論