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Phan So
Guest_phuc_* trong Phan So nguyen phu trong Phan So lehuy0305 trong Chuyện Net! lehuy0305 trong Chuyện Net! lehuy0305 trong Đọc đi! lehuy0305 trong Anh khờ. lehuy0305 trong Anh khờ. lehuy0305 trong Những câu nói bất hủ!!!! lehuy0305 trong Những câu nói bất hủ!!!! |
import java.util.Scanner;
public class TestString{ public static void display() { System.out.println("1. Khoi tao 1 xau rong"); System.out.println("2. Khoi tao 1 chuoi ky tu"); System.out.println("3. Cong 2 chuoi ky tu"); System.out.println("4. Noi 2 chuoi bang phuong thuc conCat"); System.out.println("5. Su dung ham substring de lay 1 chuoi ky tu trong 1 xau"); System.out.println("6. Su dung ham Length, Lay ra do dai cua chuoi"); System.out.println("7. Ham equals"); System.out.println("8. toUpperCase"); System.out.println("9. toLowerCase"); System.out.println("10. Exit"); } public void xauRong(){ System.out.println("Khoi tao 1 xau rong"); String str1 = new String(); System.out.println("Xau rong! ko co ky tu nao: "+str1); } public void xau_ko_rong(){ System.out.println("\n"); Scanner s = new Scanner(System.in); String str2 = ""; System.out.println("Nhap vao 1 chuoi ky tu: "); str2 = s.nextLine(); System.out.println("Chuoi ma ban vua nhap la: "+str2); } public void congChuoi(){ System.out.println("\n"); System.out.println("Cong 2 chuoi:"); String str3 =new String("chao cac ban!"); System.out.println("thanks va "+str3); } public void conCat(){ System.out.println("\n"); Scanner s1 = new Scanner(System.in); System.out.println("Noi 2 chuoi bang phuong thuc concat :"); String t1=""; System.out.println("Nhap vao 1 chuoi ky tu thu 1: "); String t3; t1 = s1.nextLine(); String t2=""; System.out.println("Nhap vao 1 chuoi ky tu thu 2: "); t2 = s1.nextLine(); System.out.println("Chuoi ky tu thu 1 vua nhap: "+t1); System.out.println("Chuoi ky tu thu 2 vua nhap: "+t2); t3=t1.concat(t2); System.out.println("\n"); System.out.println("Chuoi ky tu sau khi ghep la:"+t3); } public void substring(){ System.out.println("\n"); System.out.println("Su dung ham substring de lay 1 chuoi ky tu trong 1 xau:"); Scanner s2 = new Scanner(System.in); String str4 = ""; System.out.println("Nhap vao 1 chuoi ky tu: "); str4 = s2.nextLine(); System.out.println("Chuoi ma ban vua nhap la: "+str4); String str5=str4.substring(4,12); System.out.println("\n"); System.out.println("Chuoi ky tu lay trong xau: "+str5); } public void length(){ System.out.println("\n"); System.out.println("Lay ra do dai cua chuoi:"); Scanner s3 = new Scanner(System.in); String str6 = ""; System.out.println("Nhap vao 1 chuoi ky tu: "); str6 = s3.nextLine(); System.out.println("Chuoi ma ban vua nhap la: "+str6); int n=str6.length(); System.out.println("Do dai la:"+n); } public void equals(){ System.out.println("\n"); Scanner s4 = new Scanner(System.in); String str7 = ""; String str8 = ""; System.out.println("Nhap vao chuoi thu nhat:"); str7 = s4.nextLine(); System.out.println("Nhap vao chuoi thu hai:"); str8 = s4.nextLine(); System.out.println("chuoi thu nhat ban nhap:"+str7); System.out.println("chuoi thu hai ban nhap:"+str8); System.out.println("\n"); Boolean k=str7.equals(str8); System.out.println("2 chuoi co giong nhau ko? "+k); System.out.println("\n"); } public void toUpperCase(){ Scanner s5 = new Scanner(System.in); String str9 = ""; System.out.println("Nhap vao 1 chuoi ky tu: "); str9 = s5.nextLine(); System.out.println("Chuoi ma ban vua nhap la: "+str9); String str10 = str9.toUpperCase(); System.out.println("Chuyen chuoi sang dang ky tu in Hoa: "+str10); } public void toLowerCase(){ Scanner s6 = new Scanner(System.in); String str11 = ""; System.out.println("Nhap vao 1 chuoi ky tu in Hoa: "); str11 = s6.nextLine(); System.out.println("Chuoi ma ban vua nhap la: "+str11); String str12 = str11.toLowerCase(); System.out.println("Chuyen chuoi sang dang ky tu thuong: "+str12); } public static void main(String[] args){ TestString xau_1 = new TestString(); Scanner s = new Scanner(System.in); int i = 0; while (i != 10) { display(); System.out.println("\n"); System.out.println("\n"); System.out.print("moi ban chon so: "); i = s.nextInt(); if(i == 1){ System.out.println("\n"); System.out.println("ban da chon: Phuong an 1"); xau_1.xauRong(); System.out.println("\n"); } else if(i == 2) { System.out.println("\n"); System.out.println("ban da chon: Phuong an 2"); xau_1.xau_ko_rong(); System.out.println("\n"); } else if(i == 3) { System.out.println("\n"); System.out.println("ban da chon: Phuong an 3"); xau_1.congChuoi(); System.out.println("\n"); } else if(i == 4) { System.out.println("\n"); System.out.println("\n"); System.out.println("Xau sau khi ghep: "); xau_1.conCat(); System.out.println("\n"); } else if(i == 5) { System.out.println("\n"); System.out.println("ban da chon: Phuong an 5"); xau_1.substring(); System.out.println("\n"); } else if(i == 6) { System.out.println("\n"); System.out.println("ban da chon: Phuong an 6"); xau_1.length(); System.out.println("\n"); } else if(i == 7) { System.out.println("\n"); System.out.println("ban da chon: Phuong an 7"); xau_1.equals(); System.out.println("\n"); } else if(i == 8) { System.out.println("\n"); System.out.println("ban da chon: Phuong an 8"); xau_1.toUpperCase(); System.out.println("\n"); } else if(i == 9) { System.out.println("\n"); System.out.println("ban da chon: Phuong an 9"); xau_1.toLowerCase(); System.out.println("\n"); } } } /* TestString xau_1 = new TestString(); xau_1.xauRong(); xau_1.xau_ko_rong(); xau_1.congChuoi(); xau_1.conCat(); xau_1.substring(); xau_1.length(); xau_1.equals(); } */ } |
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