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jAvA 求助!!!!!!

public Demo{ public static void main(String args[]){ Desk myDesk=new Desk(235,335,36,"blue") } } 以上不知道你是笔误还是什么 应该写成: public class Demo{ public

//建一个A类 class A{ //成员变量 其中num是实参 int num=0; //成员方法,其中 i 是型参 public A(int i){ //输入int型文件输出下面 System.out.println("aaaaaaaaaaaaaaaaaaa"); System.out.println("i= "+i); //把输入的i赋值给成员

student stu1-new student(); studnet stu2=new student(); '. 或 Student[] stu=new Student[10];

sort方法有问题,if(score[i][maxCourse]>score[i+1][maxCourse])只能作用其后一行代码 for(int i=0;i<maxStudent-1-j;i++) {if(score[i][maxCourse]>score[i+1][maxCourse]) tempt=score[i]; score[i]=score[i+1]; score[i+1]=tempt; }应该是 for(int i=0;i<

Point类 public class Point { private int x; private int y; public int getX() { return x; } public int getY() { return y; } public Point() { x = 0; y = 0; } public Point(int xx, int yy) { x = xx; y = yy; } public double distance(Point p) { return Math.sqrt((x - p.getX()) * (x - p.

用正则表达式替换多余一个的空串为“ ”public static String replaceSpace(String str) { return str.replaceAll("\\s+", " "); }

类BankAccount public class BankAccount { private String m_sName; private double m_dBalance; private double m_dInterestRate; public BankAccount(){}//无参数的构造函数 public BankAccount(String m_sName,double m_dBalance,double

4. 以下表述错误的是(C)C. 数组的下标的数据类型一般为float5. 下面哪个说法正确(C)C. 如果某源文件包含package语句,则该语句必须是第一个非空、非注释行6. 给定下面的代码段,哪些选项是对setVar(B)方法的重载?() 1. public

*********************父类文件:Animal.java**************************public abstract class Animal { private boolean isLive = true; public AnimalCharater character = new AnimalCharater(); public boolean isLive() { return isLive; } public void setDeath() {

import java.awt.*; import java.awt.event.*; import javax.swing.*; public class ButtonClick { public static void main(String[] args) { ButtomFrame frame=new ButtomFrame(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.

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