问道java题，输出矩阵最大值

Python014

问道java题，输出矩阵最大值,第1张

public static int max(int a[][]) {

int maxElement = Integer.MIN_VALUE

for (int row = 0row <a.lengthrow++) {

for (int col = 0col <a[row].lengthcol++){

if (a[row][col] >maxElement)

maxElement = a[row][col]

}

}

return maxElement

}

import java.awt.Button

import java.awt.FlowLayout

import java.awt.Label

import java.awt.TextField

import java.awt.event.ActionEvent

import java.awt.event.ActionListener

import java.awt.event.WindowAdapter

import java.awt.event.WindowEvent

import java.awt.*

import javax.swing.JOptionPane

public class changeNumto extends Frame{

Button b = new Button("Change")

Label l1 = new Label("Decimal")

Label l2 = new Label("binary")

Label l3 = new Label("octal")

Label l4 = new Label("hex")

int binary1,octal1,hex1

int x, y

TextField tf1 = new TextField(null, 10)

TextField tf2 = new TextField(null, 10)

TextField tf3 = new TextField(null, 10)

TextField tf4 = new TextField(null, 10)

public changeNumto() {

super("changeNum")

setLayout(new FlowLayout(FlowLayout.LEFT))

add(l1)

add(tf1)

add(l2)

add(tf2)

add(l3)

add(tf3)

add(l4)

add(tf4)

add(b)

pack()

setVisible(true)

addWindowListener(new WindowAdapter() {

public void windowClosing(WindowEvent e) {

System.exit(0)

}

})

b.addActionListener(new ButtonListener())

}

class ButtonListener implements ActionListener {

public void actionPerformed(ActionEvent e) {

if (tf1.getText() != null) {

try {

x = Integer.parseInt(tf1.getText())

tf2.setText("" + Integer.toBinaryString(x))

tf3.setText("" + Integer.toOctalString(x))

tf4.setText("" + Integer.toHexString(x))

} catch (NumberFormatException ex) {

JOptionPane.showMessageDialog(l1, "You input is not a int, please input a int")

}

}

}

}

public static void main(String[] args) {

new changeNumto()

}

}