practice1

import java.io.*;
public class practice1
{
public static void main(String[] args)throws IOException
{
BufferedReader keyin= new BufferedReader(new InputStreamReader(System.in));
System.out.println("Please enter some numbers ");
String numberString=keyin.readLine();
int number = Integer.parseInt(numberString.trim());
int answer=1;
while(number > 0)
{
answer=answer*number;
numberString = keyin.readLine();
number = Integer.parseInt(numberString.trim());
}
System.out.println("sum is "+answer);
}
}

test

project3_7

import java.io.*;
public class p3_7
{
public static void main(String[] args) throws IOException
{
BufferedReader keyin= new BufferedReader(new InputStreamReader(System.in));
System.out.println("Please enter the number x of e^x");
int x = Integer.parseInt(keyin.readLine());
System.out.println("Please enter the number n ");
int n = Integer.parseInt(keyin.readLine());
double i,j,k=1,s,m=1,sum=0;
for(i=0;i<=n;i++) { for(j=i;j>0;j--)
k=k*j;
for(s=i;s>0;s--)
m=m*x;
sum=sum+(m/k);
}
System.out.println("e^x = "+sum);
}
}

max_min

import java.io.*;
import java.io.IOException;
public class testmin
{
public static void main(String[] args) throws IOException
{
BufferedReader keybord = new BufferedReader(new
InputStreamReader(System.in));
System.out.println("Please enter some numbers");
String inputString1 =keyboard.readLine();
int next1 = Integer.parseInt(inputString1);
int theNumber=next1;
int a[]={theNumber};
int i,j;
for (i = 0; ; i++);
System.out.println(a[i]);
for (i = 0; ; i++);
int k,temp,s;
for (i = 0; ; i++){
s=0;
for (j = 0; ; i++)
{
if(a[j]>a[j=+1]){
s=1;
temp=a[j];
a[j]=a[j+1];
a[j+1]=temp;
}
}
if(s !=1)
break;
}
System.out.println("the min is"+a[0]);
System.out.println("the max is"+a[j+1]);

}
}

試了好久~~好像還是不太行

if else 154

import javax.swing.JOptionPane;
public class display3_1
{
public static void main(String[] args)
{
String theNumber=JOptionPane.showInputDialog("Enter the number ");
int number=Integer.parseInt(theNumber);
if(number <>
System.out.println(number+"is less than zero.");
else if (number <>
System.out.println(number+"is between 0 and 99(inclusuve).");
else
System.out.println(number+"is 100 or large.");
System.exit(0);
}
}

project2_7

import javax.swing.JOptionPane;
public class project2_7
{
public static void main(String[] args)
{
String thePrice=JOptionPane.showInputDialog("Enter price of item\n"+"(from 25 cents to a dollar, in 5-cent increments):");
int price=Integer.parseInt(thePrice);
System.out.println("You bought an item for "+price+" cents and gave me a dollar,\n"+"so your change is");
int change = 100 - price;
int quarter=0,dime=0,nickel=0;
if(change >= 25)
{
quarter = change / 25;
change = change%25;
}
if(change>=10 &&amp; change <25) dime =" change/10;" change =" change%10;">=5 && change <10)
{
nickel = change/5;
change = change%5;
}
if(change<0)
{
System.out.println("You should pay more money!!!");
}
System.out.println(quarter+" quarters,");
System.out.println(dime+" dimes,and");
System.out.println(nickel+" nickels.");
System.exit(0);
}
}

project2_5

import javax.swing.JOptionPane;
public class project2_5
{
public static void main(String[] args)
{
String myPurchase=JOptionPane.showInputDialog("Enter the purchase price");
double purchaseprice = Integer.parseInt(myPurchase);
String mySalvage =JOptionPane.showInputDialog("Enter the salvage value");
double salvagevalue = Integer.parseInt(mySalvage);
String myYear = JOptionPane.showInputDialog("Enter the number of year");
double numberyear = Integer.parseInt(myYear);
double d;
d=(purchaseprice-salvagevalue)/numberyear;
System.out.println("The value of the yearly depreciation is "+d);
}
}

IncomeTax

public class IncomeTax
{
public static void main(String[] args)
{
double netIncome=30000,tax,fivePercentTax,tenPercentTax;
if(netIncome <=15000)
tax=0;
else if ((netIncome>15000)&&(netIncome<=30000))
tax=(0.05*(netIncome-15000));
else
{
fivePercentTax =0.05*15000;
tenPercentTax=0.10*(netIncome-30000);
tax=(fivePercentTax + tenPercentTax);
}
System.out.println("Tax due = "+ tax);
}
}

scannerDemo

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;
public class scannerDemo
{
public static void main(String[] args) throws IOException
{
BufferedReader keyboard= new BufferedReader(new InputStreamReader(System.in));
System.out.println("Enter the number of pods followed by ");
System.out.println("the number of peas in a pod:");
int numberOfPods =Integer.parseInt(keyboard.readLine());
int peasPerPod =Integer.parseInt(keyboard.readLine());
int totalNumberOfPeas = numberOfPods*peasPerPod;
System.out.println(numberOfPods +" ponds and ");
System.out.println(peasPerPod +" peas per pod .");
System.out.println("The total number of peas = " +totalNumberOfPeas );
}
}

10/17上課練習程式

import javax.swing.JOptionPane;
public class test
{
public static void main(String[] args)
{
String myString=JOptionPane.showInputDialog("Enter a number");
int myNumber = Integer.parseInt(myString);
System.out.println("The number is "+ myNumber);
System.exit(0);
}
}

display1.7

display1.7程式碼

public class StringProcess
{
public static void main(String[] args)
{
String sentence = " I hate text processing!";
int position =sentence.indexOf(" hate ");
String ending=
sentence.substring(position + " hate ".length() );
System.out.println("01234567890123456789012");
System.out.println(sentence);
System.out.println(" The word \" hate \" atarts at index "+position);
sentence=sentence.substring(0,position) + "adore" +ending;

System.out.println("The changed string is: ");
System.out.println(sentence);
}
}

project5

project 程式碼

public class project5
{
public static void main(String[] args)
{
String sentence = " I hate you";
int position =sentence.indexOf(" hate ");
String ending=sentence.substring(position+ "hate".length());
System.out.println("The line of text to be charged is:");
System.out.println(sentence);
System.out.println("I have rephrased that line to read");
sentence=sentence.substring(0,position) + " love " + ending;
System.out.println(sentence);
}
}

HW3

public class cal_hw3
{
public static void main(String[] args)
{
System.out.println("we know ");
System.out.println("running 6 MPH:10 METS ");
System.out.println ("basketball:8 METS");
System.out.println ("sleeping:1METS");
System.out.println("The person is 150/2.2 Kg ");
double w=150/2.2,cal_r,cal_b,cal_s,all;
cal_r=0.0175*10*w*30;
cal_b=0.0175*8*w*30;
cal_s=0.0175*1*w*6*60;
all=cal_r+cal_b+cal_s;
System.out.println("The person is "+w+" Kg.");
System.out.println("The person consumed "+cal_r+" Calories for running.");
System.out.println("He consumed "+cal_b+" Calories for basketball.");
System.out.println("He consumed "+cal_s+" Calories for sleeping.");
System.out.println("The tatal number of calories he consumed is "+all+" .");
}

}