String str = "1234";
int n ;
try
{
n = Integer.parseInt(str);
System.out.println(n);
}catch(Exception e){}
n = 1234;
String s = ""+n;
if(s.length<8)
for(int i = 0;i<8-s.length;i++)
s = "0"+s;
System.out.println(s);
int n ;
try
{
n = Integer.parseInt(str);
System.out.println(n);
}catch(Exception e){}
n = 1234;
String s = ""+n;
if(s.length<8)
for(int i = 0;i<8-s.length;i++)
s = "0"+s;
System.out.println(s);
your code:
String str = "1234";
int n ;
try
{
n = Integer.parseInt(str);
System.out.println(n);
}catch(Exception e){}
n = 1234;
String s = ""+n;
if(s.length<8)
for(int i = 0;i<8-s.length;i++)
s = "0"+s;
System.out.println(s);
运行结果:
1234
001234
不对。
因为:for循环里s的长度在增加,i也在增加,当循环2次时,i==2,8-s.length()==2;
循环停止。
应为:
String str = "1234";
int n ;
try
{
n = Integer.parseInt(str);
System.out.println(n);
}
catch(Exception e)
{
System.out.println(e);
}
n = 1234;
String s =Integer.toString(n);
if(s.length()<8)
{
int temp=8-s.length();
for(int i = 0;i<temp;i++)
s = "0"+s;
}
System.out.println(s);
(String----->int)
String str="1243";
int i=Integer.parseInt(str);(int-------->String)
int n=12;
java.text.DecimalFormat df=new java.text.DecimalFormat("00000000");
String s=df.format(n);
我就这样分配了.
ghw 10分.
foolboylsh 6分
辉 4分.