怎么把数组String []str={"aa","bb","cc","dd","ee","gg","ff","ll","kk","ii"};打印成
aa bb cc
dd ee gg
ff ll kk
ii
这样写报越界异常
for(int i=0;i<=str.length;)
{
for(int j=0;j<3;j++,i++)
{
System.out.print(str[i]);
}
System.out.println();
}
大虾门指点啊！
------解决方案--------------------
for(int i=0;i<str.length;)
{
for(int j=0;j<3 && i<str.length;j++,i++)
{
System.out.print(str[i]);
}
System.out.println();
}
------解决方案--------------------
String []str={"aa","bb","cc","dd","ee","gg","ff","ll","kk","ii"};
for(int i=0;i<str.length;)
{
for(int j=0;j<3;j++,i++)
{
System.out.print(str[i] + " ");
}
System.out.println();
}
------解决方案--------------------
为什么要用双重循环？
- Java code
public class Test { /** * @param args */ public static void main(String[] args) { String []str={"aa","bb","cc","dd","ee","gg","ff","ll","kk","ii"}; for(int i = 0; i < str.length; i++){ if(i > 0 && i % 3 == 0){ System.out.println(); } System.out.print(str[i] + " "); } }}
------解决方案--------------------
- Java code
class TestContinue{ public static void main(String args[]){ String []str={"aa","bb","cc","dd","ee","gg","ff","ll","kk","ii"}; int i = 0; for(String n: str){ System.out.print(n + " "); i++; if(i%3 == 0){ System.out.println(); continue; } } }}
------解决方案--------------------
我傻了，干嘛用那个continue....
------解决方案--------------------
- Java code
class TestContinue{ public static void main(String args[]){ String []str={"aa","bb","cc","dd","ee","gg","ff","ll","kk","ii"}; int i = 0; for(String n: str) System.out.print(n + ((++i)%3==0?"\n":"\t")); }}
------解决方案--------------------
楼上方法 精简之上
------解决方案--------------------
- Java code
String[] str={"aa","bb","cc","dd","ee","gg","ff","ll","kk","ii"}; for(int i=0;i<str.length;i++){ if(i!=0){ if(i%3==0){ System.out.println(); }else{ System.out.print(" "); } } System.out.print(str[i]); }
------解决方案--------------------