String的用法——其余功能

时间 2019-12-07

标签 string 用法其余功能繁體版

原文原文链接

package cn.itcast_06;
/*code

String类的其余功能：
```
替换功能：
```
```
String replace(char old,char new)
```
```
String replace(String old,String new)
```
```
去除字符串两空格：
```
```
String trim()
```

按字典顺序比较两个字符串（大小）

int compareTo(String str)//区分大小写

int compareToIgnoreCase(String str)//不区分大小写

public class StringDemo {字符串

public static void main(String[] args) {
    // TODO Auto-generated method stub
    //替换功能
    String s1 = "helloworld";
    String s2 = s1.replace('l', 'k');
    String s3 = s1.replace("ll", "kk");
    String s4 = s1.replace("ll", "kkkkk");
    
    System.out.println("s1:" + s1);//helloworld
    System.out.println("s2:" + s2);//hekkoworkd
    System.out.println("s3:" + s3);//hekkoworld
    System.out.println("s4:" + s4);//hekkkkkoworld
    
    //去除字符串两端空格：String trim()
    String s5 = "         hello     world                  ";
    String s6 = s5.trim();
    System.out.println("s5:" + s5 + "---");
    System.out.println("s6:" + s6 + "---");
    
    //按字典顺序比较两个字符串（大小）
    String s7 = "hello";
    String s8 = "hfllo";
    String s9 = "gbc";
    String s10 = "xyz";
    System.out.println(s7.compareTo(s7));//0
    System.out.println(s7.compareTo(s8));//-1
    System.out.println(s7.compareTo(s9));//1
    System.out.println(s7.compareTo(s10));//-16
    
}

}it