Upload Tugas 2

Tugas2/MainActivity.kt

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+package com.example.programpengurutanangka
+
+import android.os.Bundle
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.setContent
+import androidx.activity.enableEdgeToEdge
+import androidx.compose.foundation.layout.*
+import androidx.compose.material3.*
+import androidx.compose.runtime.*
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.foundation.text.KeyboardOptions
+import androidx.compose.ui.text.input.KeyboardType
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.dp
+import com.example.programpengurutanangka.ui.theme.ProgramPengurutanAngkaTheme
+
+class MainActivity : ComponentActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        enableEdgeToEdge()
+        setContent {
+            ProgramPengurutanAngkaTheme {
+                Scaffold { innerPadding ->
+                    ProgramPengurutanAngka(
+                        modifier = Modifier
+                            .padding(innerPadding)
+                            .padding(16.dp)
+                    )
+                }
+            }
+        }
+    }
+}
+
+@Composable
+fun ProgramPengurutanAngka(modifier: Modifier = Modifier) {
+    var input by remember { mutableStateOf("") }
+    var result by remember { mutableStateOf("") }
+    var error by remember { mutableStateOf<String?>(null) }
+    var ascending by remember { mutableStateOf(true) }
+
+    Column(
+        modifier = modifier.fillMaxSize(),
+        verticalArrangement = Arrangement.Top,
+        horizontalAlignment = Alignment.Start
+    ) {
+        OutlinedTextField(
+            value = input,
+            onValueChange = {
+                input = it
+                error = null
+            },
+            label = { Text("Masukkan angka (contoh: 9, 5, 1 atau 9 5 1 atau 9;5;1)") },
+            modifier = Modifier.fillMaxWidth(),
+            keyboardOptions = KeyboardOptions.Default.copy(keyboardType = KeyboardType.Text)
+        )
+
+        Spacer(modifier = Modifier.height(8.dp))
+
+        Row(verticalAlignment = Alignment.CenterVertically) {
+            Text("Urutkan:")
+            Spacer(modifier = Modifier.width(8.dp))
+            RadioButton(selected = ascending, onClick = { ascending = true })
+            Text("Ascending", modifier = Modifier.padding(end = 12.dp))
+            RadioButton(selected = !ascending, onClick = { ascending = false })
+            Text("Descending")
+        }
+
+        Spacer(modifier = Modifier.height(12.dp))
+
+        Button(onClick = {
+            // Ambil semua angka yang valid (mendukung sign dan desimal, koma/dot sebagai pemisah desimal)
+            val regex = Regex("-?\\d+[\\.,]?\\d*")
+            val parsed = regex.findAll(input)
+                .map { it.value.replace(',', '.') }   // ubah koma jadi dot supaya parseDouble berhasil
+                .mapNotNull { it.toDoubleOrNull() }
+                .toList()
+
+            if (parsed.isEmpty()) {
+                error = "Tidak ditemukan angka valid. Gunakan pemisah koma/spasi/semicolon atau masukkan angka."
+                result = ""
+            } else {
+                val sorted = if (ascending) parsed.sorted() else parsed.sortedDescending()
+                result = sorted.joinToString(", ") { n ->
+                    // tampilkan tanpa .0 jika integer
+                    if (n % 1.0 == 0.0) n.toLong().toString() else n.toString()
+                }
+                error = null
+            }
+        }) {
+            Text("Urutkan")
+        }
+
+        Spacer(modifier = Modifier.height(12.dp))
+
+        if (error != null) {
+            Text(text = error!!, color = MaterialTheme.colorScheme.error)
+        }
+
+        Text(
+            text = "Hasil: $result",
+            style = MaterialTheme.typography.bodyLarge,
+            modifier = Modifier.padding(top = 8.dp)
+        )
+    }
+}
+
+@Preview(showBackground = true)
+@Composable
+fun PreviewProgram() {
+    ProgramPengurutanAngkaTheme {
+        ProgramPengurutanAngka()
+    }
+}