hello can you help me rewrite this in java the language below is typescript

TriangleClassFile.ts

// Defined Triangle class // this class is imported in DriverFile.ts file export class Triangle { // declared private data member for side lengths // of the triangle private sideAlen: number; private sideBlen: number; private sideClen: number; // defined constructor for the Triangle class constructor(len1: number, len2: number, len3: number){ this.sideAlen = len1; this.sideBlen = len2; this.sideClen = len3; // checking if the triangle is a valid triangle or not. if(!this.IsTriangleValid()){ console } } // defined a protected member function // it checks whether the triangle entered by // user is a valid triangle or not. protected IsTriangleValid(){ let len1 = this.sideAlen; let len2 = this.sideBlen; let len3 = this.sideClen; // if sum of any two sides is smaller than the third side then the triangle is not valid. // otherwise it is a valid triangle if(((len1 + len2)<=len3) || ((len2 + len3)<=len1) || ((len3 + len1)<=len2)){ return false; } return true; } // this function returns the semi perimeter of the triangle public GetSemiPerimeter(){ return 0.5*this.GetPerimeter(); } // this function returns the area of the triangle public GetArea(){ let sp = this.GetSemiPerimeter(); let a = this.sideAlen; let b = this.sideBlen; let c = this.sideClen; // using Heron's formula to compute the area of the circle return (Math.sqrt(sp*(sp-a)*(sp-b)*(sp-c))); } // this function computes the angle A of the triangle public GetAngleA(){ let a = this.sideAlen; let b = this.sideBlen; let c = this.sideClen; // using law of cosines to compute the angle of the triangle return (180.0/Math.PI)*Math.acos(((b*b) + (c*c) - (a*a))/(2*b*c)); } // this function computes the angle B of the triangle public GetAngleB(){ let a = this.sideAlen; let b = this.sideBlen; let c = this.sideClen; // using law of cosines to compute the angle of the triangle return (180.0/Math.PI)*Math.acos(((c*c) + (a*a) - (b*b))/(2*c*a)); } // this function computes the angle C of the triangle public GetAngleC(){ let a = this.sideAlen; let b = this.sideBlen; let c = this.sideClen; // using law of cosines to compute the angle of the triangle return (180.0/Math.PI)*Math.acos(((a*a) + (b*b) - (c*c))/(2*a*b)); } // this function returns the name of the triangle public GetName(){ let a = this.sideAlen; let b = this.sideBlen; let c = this.sideClen; let A = this.GetAngleA(); let B = this.GetAngleB(); let C = this.GetAngleC(); let name = ""; // if all angles are smaller than 90 degrees then // the triangle is acute triangle if(A<90 && b<90 c<90){ name + =Acute  ;}>90 || B>90 || C>90){ name += "Obtuse "; } // if all the sides of the triangle are equal // then the triangle is Equilateral if(a == b && b == c){ name += "Equilateral"; } // if only two sides of the triangle are // equal, then the triangle is Isoceles else if(a==b || b==c || c==a){ name += "Isoceles"; } // if none of the sides are equal to each other, // then the triangle is Scalene else if(a!=b && b!=c && c!=a){ name += "Scalene"; } // return name of the triangle return name; } // this function returns the perimeter of the triangle public GetPerimeter(){ return this.sideAlen + this.sideBlen + this.sideClen; } } 

Main.ts

// importing the Triangle class from TriangleClassFile import { Triangle } from "./TriangleClassFile"; // main function function main(){ // created a variable input, that helps in // reading user input const input = require('prompt-sync')(); // asking user to input values for sideA, // sideB and sideC console.log("Side A:"); let sideA = input(''); console.log(" Side B:"); let sideB = input(''); console.log(" Side C:"); let sideC = input(''); // created object of class Triangle and calling different member // functions let T = new Triangle(Number(sideA), Number(sideB), Number(sideC)); // calling GetArea() console.log("The area is: ", T.GetArea()); // calling GetAngleA() console.log("Angle A is: ", T.GetAngleA()); // calling GetAngleB() console.log("Angle B is: ", T.GetAngleB()); // calling GetAngleC() console.log("Angle C is: ", T.GetAngleC()); // calling GetName() console.log("The name is: ", T.GetName()); // calling GetPerimeter() console.log("The perimeter is: ", T.GetPerimeter()); } main();