package cn.lijun.demo2;
public class StringDemo3 {
public static void main(String[] args) {
fun9();
}
//9 boolean equals(Object obj); 判断字符串里面完全相等 返回true
//s.equalsIgnoreCase(s1) 不区分大小写的比较
public static void fun9(){
String s = "hello";
String s1= "hEllo";
System.out.println(s.equals(s1));
System.out.println(s.equalsIgnoreCase(s1));
}
//8 将字符串 转字符数组
public static void fun8(){
String s = "今晚11点老地方见 不见不散";
char[] s1 = s.toCharArray();
for (int i = 0; i < s1.length; i++) {
System.out.println(s1[i]);
}
}
//7 将字符串转字节数组 getBytes();
public static void fun7(){
String s = "今晚11点老地方见 不见不散";
byte[] s1 = s.getBytes();
//System.out.println(s1);
for (int i = 0; i < s1.length; i++) {
System.out.println(s1[i]);
}
}
// 6 查找一个字符 indexOf(char ch) 返回int 返回-1 没有找到
public static void fun6(){
String s = "hello.java";
int s1 = s.indexOf('w');
System.out.println(s1);
}
//5 contains判断一个字符串是否有另一个字符串
public static void fun5(){
String s = "hello.java";
boolean s1 = s.contains("ll");
System.out.println(s1);
}
//4判断一个字符串的后缀 结尾 endsWith("参数");
public static void fun4(){
String s = "hello.java";
boolean s1 = s.endsWith(".java");
System.out.println(s1);
}
//3boolean statsWith(String preFix) 判断一个字符串是否包含另一个字符串
public static void fun3(){
String s = "helloworld";
boolean s1 = s.startsWith("hello");
System.out.println(s1);
}
//2 substring(int beginIndex,int endIndex)获取字符串的一部分 包含头 不包含尾
//substring(int beginIndex) 后面的全要
public static void fun2(){
String s = "helloworld";
String s2 = s.substring(2);
//String s1 = s.substring(1, 4);
System.out.println(s2);
}
// 1 int length(); 返回的是字符串的长度
public static void fun1(){
String string = "skjl";
int l = string.length();
System.out.println(l);
}
}