2个简单问题

[wtobias]

1
String s = “ABCDEFG”

一句代码把CDEF取出来
2
String s = “%QQWQW% AS ASA”
一句代码把XXXXX替换%QQWQW%

[kamiiyu]

1.s.substring(2);
2.s.replace("%QQWQW%","xxxxxxx");

[yitianyidian]

1,s.substring(2,6);

[脓水]

1.s.substring(2,4);
2.s.replace("%QQWQW%","xxxxxxx");

[xiexie777]

楼上对

[yitianyidian]

不是的，SubString(int beginIndex,int endIndex);

[TinyJimmy]

不就是String自己的方法咯

[ufoBizSoft]

subString有可能是 : SubString(int beginIndex, int charNumber), 具体可以看jdk帮助