isempty for arrays
arr = new int[0];
if (arr.length == 0) {
System.out.println("array is empty");
}isempty for arrays
arr = new int[0];
if (arr.length == 0) {
System.out.println("array is empty");
}java check if array element is null
public class test {
public static void main(String[] args) {
Object[][] someArray = new Object[5][];
someArray[0] = new Object[10];
someArray[1] = null;
someArray[2] = new Object[1];
someArray[3] = null;
someArray[4] = new Object[5];
for (int i=0; i<=someArray.length-1; i++) {
if (someArray[i] != null) {
System.out.println("not null");
} else {
System.out.println("null");
}
}
}
}
$ /cygdrive/c/Program\ Files/Java/jdk1.6.0_03/bin/java -cp . test
not null
null
not null
null
not nullisempty for arrays
Object arr[] = new Object[10];
boolean empty = true;
for (int i=0; i<arr.length; i++) {
if (arr[i] != null) {
empty = false;
break;
}
}Copyright © 2021 Codeinu
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