System.out.println("uim".equals(change1("sim")));
result = change2("sim卡");
System.out.println(result);
System.out.println("uim卡".equals(result));
CharSequence csq1 = "the uim card";
CharSequence csq2 = "the sim card";
CharSequence re = change1(csq2);
System.out.println(re);
System.out.println(csq1.equals(re));
System.out.println(null == change1(null));
}
interface Omission {
/**
* @param str
* @param s1
* @param s2
* @param from
* @return false: if want the 'str' to replace the 's1'(after index 'from')
* with 's2'.
*/
public boolean isOmit(String str, String s1, String s2, int from);
}
摘自 abh200的专栏