package cn.china;
public class StringDemo7 {
public static void main(String[] args) {
String string = " dfg ";
String s =mytrim(string);
System.out.println(s);
}
public static String mytrim(String string) {
int start=0;
int end = string.length()-1;
while(start<=end && string.charAt(start)==' '){
start++;
}
while(start<=end && string.charAt(end)==' '){
end--;
}
return string.substring(start,end+1);
}
}
package cn.china;
public class StringDemo6 {
public static void main(String[] args) {
String s2 = "sdfgsdfghenbas";
String s1 = "asdfrethenba";
String s = maxsubstring(s1,s2);
System.out.println("s="+s);
}
public static String maxsubstring(String s1, String s2) {
String max=null,min=null;
max=s1.length()>s2.length()?s1:s2;
min = max.equals(s1)?s2:s1;
for(int x=0;x<min.length();x++){
for (int i = 0, y =min.length()-x;y<min.length()+1 ; i++,y++) {/**因为是取子串所以要+1*/
String s=min.substring(i, y);
System.out.println(s);
if(max.contains(s)){
return s;
}
}
}
return null;
}
}
package cn.china;
public class StringDemo5 {
public static void main(String[] args) {
// TODO Auto-generated method stub
String s1 = "nbasdnbasdfnbasdfnbadsnba";
String s2 = "nba";
int count = nba_times(s1, s2);
System.out.println("count="+count);
}
public static int nba_times(String s1, String s2) {
int index = 0;
int count = 0;
while ((index = s1.indexOf(s2)) != -1) {
count++;
s1 = s1.substring(index + s2.length(), s1.length());
System.out.println("s1="+s1);
}
return count;
}
}
package cn.china;
public class StringDemo4 {
public static void main(String[] args) {
// TODO Auto-generated method stub
String s1 = "nbasdnbasdfnbasdfnbadsnba";
String s2 = "nba";
int count = nba_times(s1,s2);
System.out.println("count="+count);
}
public static int nba_times(String s1, String s2) {
// TODO Auto-generated method stub
int count=0;
int index = 0;
while((index=s1.indexOf(s2,index))!=-1){
System.out.println(index);
count++;
index=index+s2.length();
}
return count;
}
}
package cn.china;
public class StringDemo3 {
public static void main(String[] args) {
// TODO Auto-generated method stub
String[]arr = {"ab","cd","ae"};
printArray(arr);
sortArray(arr);
printArray(arr);
}
public static void printArray(String [] arr){
System.out.print("[");
for(int x=0;x<arr.length;x++){
if(x!=arr.length-1){
System.out.print(arr[x]+",");
}else{
System.out.println(arr[x]+"]");
}
}
}
public static void sortArray(String[] arr){
for(int x = 0;x<arr.length-1;x++){
for(int y = 0;y<arr.length-1-x;y++){
if(arr[y].compareTo(arr[y+1])>0){
swap(arr,y,y+1);
}
}
}
}
public static void swap(String[]arr,int a,int b){
String temp=arr[a];
arr[a]=arr[b];
arr[b]=temp;
}
}
