java实现小功能

// 自写逻辑，遍历所有匹配的子字符串坐标

private static void forMatchIdx(String str1, String str2) {

char[] arr1 = str1.toCharArray();

char[] arr2 = str2.toCharArray();

f1: for (int i = 0; i < arr1.length; i++) {

for (int j = 0; j < arr2.length; j++) {

if (arr1[i + j] != arr2[j]) {

continue f1;

}

}

System.out.println("idx:" + i);

}

}