java_数组copy

Posted 2022-01-24 lipeitong

public static void main(String[] args)
int [] scoreList = new int[5];
scoreList[0] = 68;
scoreList[1] = 78;
scoreList[2] = 88;
scoreList[3] = 98;
scoreList[4] = 58;

/*
*1： 创建新的数组。长度是原来的1.5倍。
*2:依次取出原来数组的元素。取出放到新数组里
*/
int [] newList = new int[7];

// for(int i:scoreList )
// newList[]= i;
//
// for(int i =0;i<scoreList.length;i++)
// newList[i] = scoreList[i];
//

for(int i :newList)
System.out.println(i);


System.arraycopy(scoreList, 0, newList, 0, 3);

for (int i : newList)
System.out.println(i);