Array writing specification in Java
In the C language, the definition of an array is often: int array[]; and the array specification in Java is: int[] array;
The value of the array is directly fixed
public class Test {
public static void main(String[] args) {
int[] array = {
1,2,3};
int i;
for(i=0;i<array.length;i++){
System.out.println("array[" +i + "]" + "=" +array[i]);
}
}
}
Not sure about the value of the array
public class Test {
public static void main(String[] args) {
int[] array = new int[3];
int i;
for(i=0;i<array.length;i++){
array[i] = i;
}
for(i=0;i<array.length;i++){
System.out.println("array[" +i + "]" + "=" +array[i]);
}
}
}
Another way of writing the second method
public class Test {
public static void main(String[] args) {
/*另一种写法，注意null是小写*/
int array[] = null;
array = new int[3];
int i;
for(i=0;i<array.length;i++){
array[i] = i;
}
for(i=0;i<array.length;i++){
System.out.println("array[" +i + "]" + "=" +array[i]);
}
}
}