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String str = "1,2,3,4";
String[] b = str.split(",");
int[] a = new int[b.length];
for(int i=0;i<b.length;i++){
a[i] = Integer.parseInt(b[i]);
System.out.println(a[i]);
String str = "1,2,3,4";
String[] b = str.split(",");
int[] a = new int[4];
for(int i=0;i<b.length;i++){
a[i] = Integer.parseInt(b[i]);
System.out.println(a[i]);