Java程序设计(java程序设计答案)

importjavaio;

importjavaioFile;

importjavaioFileReader;

importjavaioFileWriter;

importjavaioIOException;

publicclassNewTxt{

publicstaticvoidmain(String[]args)throwsIOException{

intn=5;//NN数组

double[][]arr=newdouble[n][n];//插入的数组

double[][]arr2=newdouble[n][n];;//读取出的数组

//数组初始化，随机生成的[0,100)之间的double数

for(inti=0;i

for(intj=0;j

arr[i][j]=Mathrandom()100;

Systemoutprintln(arr[i][j]);

}

}

Filefile=newFile("d:\arraytxt");//存放数组数据的文件

FileWriterout=newFileWriter(file);//文件写入流

//将数组中的数据写入到文件中。每行各数据之间TAB间隔

for(inti=0;i

for(intj=0;j

outwrite(arr[i][j]" ");

}

outwrite("");

}

outclose();

in=new(newFileReader(file));//

Stringline;//一行数据

introw=0;

//逐行读取，并将每个数组放入到数组中

while((line=inreadLine())!=null){

String[]temp=linesplit(" ");

for(intj=0;j

arr2[row][j]=DoubleparseDouble(temp[j]);

}

row;

}

inclose();

//显示读取出的数组

for(inti=0;i

for(intj=0;j

Systemoutprint(arr2[i][j]" ");

}

Systemoutprintln();

}

}

}

哥们我给你写完了，耽误了我半个小时的时间啊！你直接运行就可以了

import javaawtBorderLayout;

import javaawtFlowLayout;

import javaawteventActionEvent;

import javaawteventActionListener;

import javautilCalendar;

import javaxswingJButton;

import javaxswingJFrame;

import javaxswingJLabel;

import javaxswingJPanel;

import javaxswingJTextField;

public class Constellation implements ActionListener{

private JFrame frame = null;

private JTextField year = null;

private JTextField month = null;

private JTextField day = null;

private JLabel label1 = null;

private JLabel label2 = null;

private JLabel label3 = null;

private JPanel panel1 = null;

private JPanel panel2 = null;

private JButton button = null;

private JTextField output = null;

public static final String[] zodiacArr = { "猴", "鸡", "狗", "猪", "鼠", "牛", "虎", "兔", "龙", "蛇",

"马", "羊" };

public static final String[] constellationArr = { "水瓶座", "双鱼座", "牡羊座", "金牛座", "双子座", "巨蟹座",

"狮子座", "处女座", "天秤座", "天蝎座", "射手座", "魔羯座" };

public static final int[] constellationEdgeDay = { 20, 19, 21, 21, 21, 22, 23, 23, 23, 23, 22,

22 };

/

根据日期获取生肖

@return 11

/

public static String date2Zodica(Calendar time) {

return zodiacArr[timeget(CalendarYEAR) % 12];

}

/

根据日期获取星座

@param time

@return

/

public static String date2Constellation(Calendar time) {

int month = timeget(CalendarMONTH);

int day = timeget(CalendarDAY_OF_MONTH);

if (day < constellationEdgeDay[month]) {

month = month - 1;

}

if (month >= 0) {

return constellationArr[month];

}

// default to return 魔羯

return constellationArr[11];

}

public Constellation(){

frame = new JFrame("计算生肖，星座");

year = new JTextField("",3);

month = new JTextField("",3);

day = new JTextField("",3);

label1 = new JLabel("请输入年份:");

label2 = new JLabel(",请输入月份：");

label3 = new JLabel(",请输入日期:");

button = new JButton("查看结果");

buttonaddActionListener(this);

panel1 = new JPanel();

panel1setLayout(new FlowLayout(FlowLayoutCENTER));

panel1add(label1);

panel1add(year);

panel1add(label2);

panel1add(month);

panel1add(label3);

panel1add(day);

panel1add(button);

framesetLayout(new BorderLayout());

frameadd(panel1,BorderLayoutNORTH);

panel2 = new JPanel();

output = new JTextField("",40);

panel2add(output,JPanelCENTER_ALIGNMENT);

frameadd(panel2,BorderLayoutCENTER);

framesetSize(500, 100);

framesetDefaultCloseOperation(JFrameEXIT_ON_CLOSE);

framesetVisible(true);

}

public void actionPerformed(ActionEvent e) {

outputsetText("");

int y = IntegerparseInt(yeargetText());

int m = IntegerparseInt(monthgetText());

int d = IntegerparseInt(daygetText());

Calendar calendar = CalendargetInstance();

calendarset(CalendarYEAR, y);

calendarset(CalendarMONTH, m);

calendarset(CalendarDAY_OF_MONTH, d);

String zodica = date2Zodica(calendar);

String constellation = date2Constellation(calendar);

String str = "您输入的日期为:"+y+"年-"+m+"-月"+d+"日,得到的生肖:"+zodica+",星座:"+constellation;

outputsetText(str);

}

//testcode

public static void main(String[] args) {

new Constellation();

}

}

public class TestAry{

public static void main(String arys[]){

int[] intAry ={1, 2, 3, 4, 5, 13};

Array ary = new Array(intAry);

Systemoutprintln("Sum of the Ary is: " + arycalcSum());

}

}

class Array {

private int[] intAry;

public Array() {

}

/

Constructor for Array

/

public Array(int[] ary) {

thisintAry = ary;

}

public int calcSum(){

int sum = 0;

for(int i = 0; i < intArylength; i++){

sum += intAry[i];

}

return sum;

}

}

以上就是关于Java程序设计(java程序设计答案)全部的内容，包括:Java程序设计(java程序设计答案)、《Java语言程序设计基础篇》第六版的练习题和编程题答案、java语言程序设计（第3版）第四章课后练习等相关内容解答，如果想了解更多相关内容，可以关注我们，你们的支持是我们更新的动力！