JAVA大学实用教程第二版耿祥义张跃平著电子工业出版社课后答案.doc
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习题解答
第一章 作业题
1．
public? class Hello{
public? static? void main (String? args[ ]){
System?.out.pintln?(“早上好，good Mornin?g”);
}
}
2．
import? java.applet?.*;
import? java.awt.*;
public? class Boy extend?s Applet? {
public? void paint(Graphi?cs g) {
g.setCol?or(Color.blue);
g.drawSt?ring(你好,hello,12,30);
}
}
第二章 作业题
1．
public? class ZuoYe2?_1{
public? static? void main (String? args[ ]){
char c=а;
System?.out.printl?n(字母+c+在unico?de表中的顺?序位置:+(int)c);
System?.out.printl?n(字母表：);
while(c=я){
System?.out.print( +c);
c=(char)(c+1);
}
}
}
2．
import? java.util.*;
public? class ZuoYe2?_2{
public? static? void main (String? args[ ]){
Scanne?r reader?=new Scanne?r(System?.in);
long chengj?i=1;
int m=0;
while(reader?.hasNex?tInt()){
int x=reader?.nextIn?t();
m=m+1;
chengj?i=chengj?i*x;
}
System?.out.printl?n(m+个数的乘积为?+chengj?i);
}
}
第三章 作业题
1．
import? java.util.*;
public? class ZuoYe3?_1{
public? static? void main (String? args[ ]){
Scanne?r reader?=new Scanne?r(System?.in);
double? y=0,x=0;
x=reader?.nextDo?uble();
if(x0)
y=-1+2*x;
else if(x==0)
y=-1;
else if(x0)
y=-1+3*x;
System?.out.printl?n(y);
}
}
2．
public? class ZuoYe3?_2{
public? static? void main(String? args[]){
int sum=0,m=3,n=7,a=1;
while(a=1000){
if(a%m==0a%n==0)
sum=sum+a;
a++;
}
System?.out.printl?n(sum=+sum);
}
}
3．
public? class ZuoYe3?_3
{
public? static? void main(String? args[])
{
long sum=0,a=8,item=a,n=10,i=1;
for(i=1;i=n;i++)
{ sum=sum+item;
item=item*10+a;
}
System?.out.printl?n(sum);
}
}
4．
public? class ZuoYe3?_4
{
public? static? void main(String? args[])
{
double? sum=0,a=1,b=1,fuhao=1,item=a/b;
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