public class sll1 { private coba1 pointer; public sll1() { pointer = null; } public void buatNode(String nim,String nama, String umur) { coba1 nodeBaru = new coba1(); nodeBaru.nim = nim; nodeBaru.nama=nama; nodeBaru.umur=umur; nodeBaru.next = pointer; pointer = nodeBaru; } public void awal(String nim,String nama, String umur) { coba1 awal = new coba1(); awal.nim = nim; awal.nama=nama; awal.umur=umur; awal.next = pointer; pointer = awal; } public void akhir(String nim,String nama, String umur){ coba1 pSblAkhir, pAkhir; pSblAkhir = null; pAkhir = pointer; coba1 baru = new coba1(); baru.nim = nim; baru.nama=nama; baru.umur=umur; baru.next = null; while(pAkhir != null){ pSblAkhir = pAkhir; pAkhir = pAkhir.next; } pSblAkhir.next = baru; } public coba1 depan(){ coba1 hapus = pointer; pointer = pointer.next; return hapus; } public void belakang(){ coba1 hapus = pointer; coba1 blakang=new coba1(); while(hapus.next.next!=null){ hapus=hapus.next; } blakang=hapus.next; hapus.next=null; } public void cetak(String kom) { System.out.println(kom); coba1 n = pointer; while (n!= null) { System.out.println("NIM:" +n.nim); System.out.println("Nama:" +n.nama); System.out.println("Umur:" +n.umur); n = n.next; } System.out.println("NULL"); } }