Public? Class? Student? {
Public? Static electricity Invalid? main(String[]？ args)？ {
int？ total student = 3；
String[]？ ID？ =? New? string[total student]；
String[]？ stuName？ =? New? string[total student]；
double[]？ java？ =? New? double[total student]；
double[]？ English? =? New? double[total student]；
double[]？ Math? =? New? double[total student]；
double[]？ averageScore？ =? New? double[total student]； ?
Scanner? sc？ =? New? Scanner (system. in);
for(int？ I = 0； I< the total number of students; i++){
System.out.println ("please enter" +(i+ 1)+ "student number");
ID[I]= sc . next()；
System.out.println ("Please enter" +(i+ 1)+ "student name");
stuName[I]= sc . next()；
System.out.println ("Please enter" +(i+ 1)+ "Students' java programming scores");
Java[I]= sc . next double()；
System.out.println ("Please enter" +(i+ 1)+ "Student's university? English scores ");
English[I]= sc . next double()；
System.out.println ("Please enter" +(i+ 1)+ "Advanced Mathematics for students");
maths[I]= sc . next double()；
Averages core[I]=(Java[I]+ English [I]+ Mathematics [I])/3;
}
while(true){
System.out.println ("Please enter a search method (1. According to the student number; 2 according to the name), enter 3 to exit ");
String? Type? =? sc . next()；
int？ index =- 1；
int？ Rank? =? 1;
if(" 1 "。 Equal to (type)) {
System.out.println ("Please enter the student ID");
String? id？ =? sc . next()；
for(int？ I = 0； I & ltID. Length; i++){
if(ID . equals(ID[I]){
index = I；
Break;
}
}
} something else? if("2 "。 Equal to (type)) {
System.out.println ("Please enter the name of the student you are looking for");
String? Name? =? sc . next()；
for(int？ I = 0； I & ltID. Length; i++){
if(name . equals(ID[I]){
index = I；
Break;
}
}
} something else? if("3 "。 Equal to (type)) {
System.out.println ("End of program!" );
Break;
} Otherwise {
System.out.println ("Input error!" );
Continue;
}
if(index==- 1){
System.out.println ("Sorry, not found");
} Otherwise {
for(int？ I = 0； I & ltaverageScore.lengthi++){
if(averages core[I]& gt； averageScore[index]){
Rank++;
}
}
System.out.println ("student number:"+ID [index]);
system . out . println(" name:"+stuName[index])；
System. Out.println ("Java programming achievement: "+Java [index]);
System.out.println ("University? English score: "+English [index]);
System.out.println ("Advanced Mathematics:"+Maths [index]);
System.out.println ("average score of three courses:"+averages core [index]);
system . out . println(" ranking:"+ranking)；
}
}
}
} I actually answered it once before ╮ (╯ _ ╰) ╭.