import java.lang.reflect.Method;
public class Test {
private static char[] substring;
public static void main(String[] args) {
String s = "abcde";
// 获取字符串的长度 5
int length = s.length();
String temp = "";
for (int i = length - 1; i > 0; i--) {
char charAt = s.charAt(i);
temp += charAt;
}
Method2("jdk");
Method3("JDK");
Method4("test");
Method41("欲游山河十万里");
Method5("131025201210233935");
boolean a = Method6("abcba");
boolean b = Method7("abcba");
System.out.println(b);
int c=Method8("can","can you can a can as a caner can can a can ");
System.out.println(c);
boolean d = Method9("abcde@163.com");
System.out.println(d);
int e = Method10("akljkfdjkflwe;fasjodjsaklkkjiosdjksl;jk");
System.out.println(e);
}
private static int Method10(String string) {
char k1 = 'a';
int k2 = 23;
System.out.println(k1+k2);
System.out.println(k1*k2);
char k3 = '小';
char k4 = '小';
System.out.println(k3*1);
char [] array = string.toCharArray();
int counter = 0;
for (int i = 0; i< array.length; i++) {
char c=array[i];
if (c<='A'&&c<='Z') {
}
}
for (char c :array) {
System.out.println(c);
}
return 0;
}
private static boolean Method9(String string) {
boolean contains = string.contains("@");
if (!contains) {
return false;
}
contains = string.contains(".");
if (!contains) {
return false;
}
int a = string.indexOf("@");
int b = string.indexOf(".");
if (a>b) {
return false;
}
return false;
}
private static int Method8(String string, String string2) {
int intdxOf = string.indexOf(string2);
int counter = 0;
return 0;
}
private static boolean Method7(String string) {
int length = string.length();
String temp = "";
for (int i = length-1; i >=0; i--) {
char charAt = string.charAt(i);
temp += charAt;
}
System.out.println(temp);
if (temp.equals(string)) {
return true;
}
return false;
}
private static boolean Method6(String string) {
int a = 0;
int b = string.length() -1;
while (a
char tempB = string.charAt(b);
if (tempB != tempB) {
return false;
}
a++;
b--;
}
return false;
}
private static void Method5(String string) {
String substring2 = string.substring(6,14);
System.out.println(substring2);
}
private static void Method41(String string) {
int indexof = string.indexOf("十万");
String substring=string.substring(indexof,indexof+2);
System.out.println(substring);
}
private static void Method4(String string) {
String a = string.substring(0,1);
System.out.println(a);
String b = string.substring(1,2);
System.out.println(b);
String c = string.substring(2,3);
System.out.println(c);
String d = string.substring(3);
System.out.println(a+c+b+d);
}
//截取字符串
private static void Method3(String string) {
//生成一个全新的字符串DK
String string2 = string.substring(1);
System.out.println(string);
System.out.println(string2);
}
private static void Method2(String temp) {
//生成了一个全新的字符串
String case1 = temp.toUpperCase();
System.out.println(temp);
System.out.println(case1);
}
}
