Question

java里如何输出才能让字符串数组不显示出null

代码如下
package testCourse;

public class Test {
public static void main(String[] args){
String[] k = new String[5];
k[0] = "a";
k[1] = "b";
for (int i = 0 ; i<k.length ; i++){
System.out.print(k[i]+",");
}
}
}
运行结果为a,b,null,null,null
有什么办法可以循环碰到null就不输出？

Answer 1

public class Test {
public static void main(String[] args){
String[] k = new String[5];
k[0] = "a";
k[1] = "b";
for (int i = 0 ; i<k.length ; i++){
if(k[i]==null)
continue;
System.out.print(k[i]+",");
}
}
}

Answer 2

package test;

public class A1
{
public static void main ( String[] args )
{
String[] k = new String[5];
k[0] = "a";
k[1] = "b";
for ( int i = 0; i < k.length; i++ )
{
String temp = k[i];
if (null != temp)
{
System.out.print (temp);
if (i < 1)
{
System.out.print (",");
}
}
}
}
}