class Temp4{
public static void main(String args[]){
int a[][] = new int[2][];
a[0] = new int[2];
a[1] = new int[3];
a[0][0] = 10;
a[1][1] = 20;
for(int j=0;j<a.length;j++){
for(int i=0;i<a[j].length;i++){
System.out.println(a[j][i] + " ");
System.out.println();
}
}
}
下面的什么意思?谢谢
a[0] = new int[2];
a[1] = new int[3];
a[0][0] = 10;
a[1][1] = 20;