(please help) convert a string to a string[]

I want to convert a string (contains empty string " ") to a string[] with out " "

Here is the source code:

String[] s4 = " 1 10.25 3.3 0.32 ".split(" ");
String[] s5 = null;
int i1 =0;
for (int i = 0; i<s4.length;i++){
if (s4[i] != " "){
s5[i1] = s4[i]; //here "java.lang.NullPointerException" error
i1++;
}
}

//expected result s5 = ["1","10.25","3.3","0.32"]

Quote:

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Originally Posted by gutou2008_2008

I want to convert a string (contains empty string " ") to a string[] with out " "

Here is the source code:

String[] s4 = " 1 10.25 3.3 0.32 ".split(" ");
String[] s5 = null;
int i1 =0;
for (int i = 0; i<s4.length;i++){
if (s4[i] != " "){
s5[i1] = s4[i]; //here "java.lang.NullPointerException" error
i1++;
}
}

//expected result s5 = ["1","10.25","3.3","0.32"]

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After you first line of code add this line:

Code:

---

System.out.println(Arrays.toString(s4));

---

... run it and see what happens; (you don't need all that other code).

kind regards,

Jos

Quote:

---

Originally Posted by gutou2008_2008

I want to convert a string (contains empty string " ") to a string[] with out " "

Here is the source code:

String[] s4 = " 1 10.25 3.3 0.32 ".split(" ");
String[] s5 = null;
int i1 =0;
for (int i = 0; i<s4.length;i++){
if (s4[i] != " "){
s5[i1] = s4[i]; //here "java.lang.NullPointerException" error
i1++;
}
}

//expected result s5 = ["1","10.25","3.3","0.32"]

---

The reason to why you are getting a nullpointer exception is because you never initialize "s5".
If you want to split it to a String array that does not contain any whitespace, try doing this instead:

Code:

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String[] s4 = " 1  10.25    3.3  0.32  ".trim().split("\\s+");

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Not sure if that is the best way of doing it, but it should work. s4 should contain the expected result.

EDIT: Fixed the code a little