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public class Hello {
public static void main(String[] args) {
String str = "as as asp as as";
System.out.println(str.replaceAll("\\bas\\b", "it"));
}
}
输出:
it it asp it it
public static void main(String[] args) {
String str = "as asp asf fd fsd as was";
String[] res = str.split("\\s");
for (String string : res) {
if(string.equals("as")){
string = "it";
}
System.out.println(string);
}
}